What Exactly Is a Toggle Button?
A toggle button is a control for switching between two or more mutually exclusive states or options. The name and function come from a skeuomorphic metaphor based on older, physical controls — most notably the common light switch. That physical forerunner establishes two key qualities that a digital toggle should inherit:
- Two clear states: A light switch is either on or off, with nothing in between. A digital toggle works the same way, always having one state set as the default.
- Immediate feedback: Flipping a light switch produces an instant, visible result. A well-designed toggle should behave similarly — the user sees the system change directly, with no need to press a
SaveorSubmitbutton.
When a Toggle Is (and Isn’t) the Right Control
Toggle-type elements only make sense under specific conditions. They should be used when the action has an immediate effect and when the setting has a default value. Outside those cases, a checkbox or a group of radio buttons is often the better choice.
Toggle Switch vs. Toggle Button
There are two distinct ways to use a toggle-type element. A toggle switch suits binary on/off options — it simply activates or deactivates a single function, and reading its state is straightforward, especially with a direct label such as "on" or "off" present.
A toggle button, by contrast, is meant for switching between opposing or multiple options. It consists of two or more buttons placed next to each other, where the selected button needs to "highlight" in some way to indicate its active state.
The core design challenge with toggle buttons is that the labels do not literally say "on" or "off" — they describe the quality of each state rather than the state itself. Users therefore have to rely on visual cues to determine which option is currently active. This places a higher burden on the designer to make the selected option unmistakably clear.
Consider a common scenario: you’re booking an airline ticket and have picked your date and destination when you encounter a control like this next to your ticket details:
If you’re unsure whether the ticket includes a return flight, you’re not alone. The goal is to design toggle buttons that signal the difference in visual weight between selected and unselected options clearly, while keeping the buttons similar enough to be perceived as parts of one whole. The state that is currently active should always be emphasized — not the command for changing it.
The Open Question in Toggle Design
The question of how to design a toggle button that clearly shows which option is selected has long been debated among UI and UX designers. There are two central questions worth answering:
- What does a good, clear, and readable toggle button look like?
- What visual characteristics make it error-proof and prevent user confusion and frustration?
When our team looked into this, we found no general rules grounded in solid user research. To address that gap, we conducted our own case study with real users, evaluating visual cues from a variety of categories and assessing how perception changes when users have more time to observe the control. In the second part of this article, we present our results — which cues work best, which fail, and why. Some of our findings challenge traditional beliefs in toggle button design, and we conclude with a set of best practices based on our discoveries.
Testing the Visual Language of Toggle Buttons
Toggle buttons are a common point of debate among designers, yet there is a surprising lack of empirical data on which visual cues most effectively communicate an active or inactive state. To address this, a study was designed to isolate and test the impact of specific visual characteristics on user perception.
The anatomy of a toggle button can include a label, filling, outline, and icons, and each of these components offers a way to signal state. During the design of the study materials, carefully chosen labels were used to ensure that the meaning of the words would not influence user choice. "Option A/B" was rejected due to implied alphabetical order, and words with real-world associations were avoided as well. To prevent any semantic effects, the buttons were labeled with nonsensical words: "Racted" and "Blison." This forced users to rely solely on visual characteristics rather than cognitive patterns or personal preference.
Based on assumptions about how these components work, the research team formulated a series of specific research questions to test the effectiveness of these standalone visual cues. The design goal was to present buttons that differed by only one visual feature so that the perception of active/inactive could be isolated to that cue.
Label Cues
Bold Text: A label with a bolder font weight is commonly thought to draw the eye. The expectation is that an emboldened label will signal an active state over a regular-text counterpart.
Text Size: Proximity of different font sizes is likely to skew perception. The hypothesis is that the button with the larger text will be seen as active, and a wider gap in sizes creates an easier distinction to read.
Inverted Color Contrast: Contrast between inverted colors implies equal weight because neither option seems to carry more visual mass. For instance, an inverted black/white pairing or a blue/orange pairing should read as equivalent options, leading to inconsistent responses from participants. Conversely, presumptions lean toward darker colors like black and blue being perceived as active because of their assertive presence, though inconsistency is the primary prediction.
For people with color vision deficiency, contrast and colors in general are insufficient cues. Design must account for this; around 8% of men are affected by daltonism and will need more than color to determine state.
Red vs Graphite Green: Despite the general issue with color-only cues, red and green have a strong cultural association in Western societies. Green is often tied to the "on" or active state, while red is associated with "off." This culturally learned consensus is expected to manifest in the tests.
Color vs. Monochrome: In a pairing of a colored label against a black-and-white one, the colored label carries more visual weight and is expected to indicate the active state. The same principle applies to a primary color vs. a gray label, as neutral gray recedes in importance.
Saturation Levels: The luminance of a single hue can be a differentiator. A label with higher color saturation should be perceived as more weighted and active when contrasted with its paler counterpart.
Filling and Background Cues
Inverted Backgrounds: Applying inverted colors to the button filling leads to the same expected outcome as inverted text. The equal visual weight of inverted shade will likely confuse, causing inconsistent choices regarding which side is active.
Red vs. Green Backgrounds: Similar to text, cultural coding is expected to take priority. A green-filled button should be perceived as the active "on" state when paired with a red one.
Background Saturation and Value: More saturated colors carry more visual weight in the study's assumptions. A vivid orange is expected to signal the active state over a muted counterpart. With grayscale, a higher lightness value in the HSV model serves as the guide, though the effect is predicted to be less evident than with saturated color wheels.
Saturated vs. Grayscale Buttons: A saturated yellow filling should be seeing as active when up against a gray button. The contrast between the yellow and a lighter gray should make the state even more apparent due to increased contrast.
Inverted Design (Text vs. Fill): This specific layout assigns the inverted coloring across the pair. When one button highlights a filled background while its peer highlights the text, the separation of active and inactive might be more difficult to interpret. While the colored fill is heavy visually, the perception of state may be less clear and consistent than with saturation cues alone.
Outline and Shape Cues
Outlines present another line of inquiry, focusing specifically on their presence and spatial arrangement. Aspects like color and thickness behave analogously to the label and filling cues already discussed, so the focus here is on effects unique to outlines and shape.
Highlighted Outline: The expectation is that a button possessing a highlighted outline will immediately be recognized as active when it stands next to a peer without one.
Button/Background Blending: This cue integrates background and border to clarify state. By making the inactive button merge into the external page background while the active button sits on a distinct colored fill, the illusion of user press is enhanced. However, there is a risk that the gray-outline-less button may no longer read as a clickable interface element, making the active state harder to determine.
Embossed vs. Debossed: Site conventions clash with tactile physical intuition. An embossed button pops out and may attract visual focus, this actual "pop" could be taken as a sign of activation. Yet, respecting skeuomorphism, a debossed (pushed-in) button should signal "on." The presence of a shadow effect could reinforce the pressed state. Given these conflicting, though expected cues, inconsistency in test results is anticipated.
Universal Symbol Cues
With icons, visual cues step away from formatting and toward direct symbology. These checks specifically ask if the icon interpretation has enough weight when other standard button formatting is removed.
Check Sign: A simple check mark centered in a button is predicted to communicate a positive "activated" state effectively.
Radio Button Filling: Borrowing the signature concentric circle design from conventional forms is another possible mechanism. An inner dot, filling the radio selection circle, should clearly pinpoint the active side of a toggle, reflecting the clear selection behavior of its standalone radio button ancestors.
Verifying Visual Cues With A Controlled Online Study
To validate our assumptions about what makes a toggle button’s state clear, we ran a quantitative online study. The goal was to gather hard data on how users perceive different visual cues. We used two variants of UXtweak’s Five Second Test tool, adjusting the display time to 5 seconds in one run and 20 seconds in another to see if additional observation time changed outcomes.
For each toggle design, we created two versions — one with the left option (Racted) active and one with the right option (Blison) active. These variants were split into two groups and distributed randomly among participants. This counterbalancing was meant to neutralize any bias caused by a visual cue being positioned on a particular side.
Stimulus Displayed For 5 Seconds
In the Five Second Test, participants saw toggle designs one at a time and were told in advance to examine each for 5 seconds before answering questions. Two questions followed every stimulus. The first was:
“Which option was turned on?”
Answers were provided via a radio button group with the options Racted (left) and Blison (right). We carefully considered how to phrase this question — an alternative like “Which button was pushed?” could be misinterpreted. Because the active state is usually the more visually prominent, a participant might interpret “pushed” as being closer to them. The atmospheric perspective principle suggests we perceive less saturated, blurred objects as more distant; asking which button was pushed could therefore produce answers that are the opposite of what we intended.
The second question measured user confidence:
“How sure do you feel about your answer?”
This was a 5-point Likert scale from “Not sure at all” to “Absolutely sure.” Since answering the first question was mandatory, this scale provided a secondary comparison metric in cases where the number of correct answers was identical between designs.
A warm-up task, not included in the analysis, ensured participants understood the instructions. It asked: “Which option have you chosen? The one that was…”, with the options “On” and “Off.” This forced participants to consider what they were supposed to identify before the real testing began.
Extended Exposure At 20 Seconds
We repeated the same procedure with a 20-second viewing period. Everything else, including the questions and counterbalancing, remained identical. This variant allowed us to test whether longer observation time improved identification of the active state.
Participant Profiling Questionnaire
Before the main tasks, each participant completed a short survey to help us profile the sample. We collected:
- Age and gender
- Highest level of education
- Frequency and primary purpose of web browsing
- Self-evaluated skill as a web user
This background data enabled us to explore correlations — for instance, whether frequent browsing predicted better performance or whether toggle perception depended on age. After completing the test, participants could leave additional feedback in an open comment field.
Recruiting A General Population Sample
We aimed for 100 responses to approximate the general population. Recruitment was handled through UXtweak’s User Panel, which suited an unmoderated online study requiring many participants. We selected panelists aged 16 to 75 from English-speaking countries (Canada, USA, GB, Australia) to match our English-language study materials.
Results And Further Reading
The findings from this study are presented in Part 2, where we discuss how to make toggle buttons unmistakably clear at first glance.
Related Reading on Smashing Magazine
- When Is A Button Not A Button?
- Designing A Better Back Button UX
- Building Inclusive Toggle Buttons
- Frustrating Design Patterns: Disabled Buttons
- Ghost Button Design: Is This Really Still A Thing (And Why)?
