Question 1

What does it mean to "mix" two colors?

Accepted Answer

In digital color theory, mixing two colors means interpolating between them at a given ratio. At 0% you see pure color A; at 100% pure color B; at 50% you see the midpoint. The question is HOW the midpoint is computed. Linear-RGB interpolation (the default in most tools) treats each color channel independently — but RGB space is gamma-encoded and perceptually non-uniform, so the midpoint between blue and yellow looks muddy gray instead of clean green. Modern color science offers perceptually-uniform spaces like OKLCH where the midpoint matches what your eye expects.

Question 2

Why does sRGB linear mix sometimes look muddy?

Accepted Answer

Two reasons. (1) sRGB is gamma-encoded (perceptually non-linear); naive averaging of R/G/B values produces darker-than-expected midpoints because the channels are in "display space" not "light space." Our sRGB Linear mode converts to linear light, interpolates, then converts back — that fixes the brightness issue. (2) Even with linear-light correction, RGB space is not perceptually uniform — a step from red to green passes through dim yellows/browns. OKLCH addresses this by using a color space tuned to match human perception; the same red-to-green transition stays bright throughout.

Question 3

When should I use OKLCH instead of sRGB?

Accepted Answer

Use OKLCH when you need smooth visual transitions — design-system shade ramps, gradients that pass through complementary colors, or palettes where perceived lightness uniformity matters. Use sRGB Linear when you need compatibility with existing assets that were authored in sRGB, or when the difference is imperceptible (e.g. mixing nearby colors at small ratios). Tailwind v4 added OKLCH support natively in 2024, CSS Color 4 standardizes it, and Apple uses it across iOS — it is the modern default for new design work.

Question 4

How does HSL mixing differ from RGB?

Accepted Answer

HSL (Hue, Saturation, Lightness) treats colors as polar coordinates on a hue wheel rather than additive light. Mixing in HSL takes the shortest path around the wheel — so blue (240°) to yellow (60°) goes through cyan and green (180° clockwise) instead of through gray. This is often what designers want when "blending" two colors. Caveat: HSL is also not perceptually uniform; lightness in HSL is calculated naively and can produce overly bright midpoints when both inputs are saturated.

Question 5

How does this differ from your Palette Generator?

Accepted Answer

The Palette Generator builds harmonious palettes (complementary, analogous, triadic, etc.) from ONE seed color using color-theory rules. Color Mixer interpolates between TWO specified colors. They solve different problems: use Palette Generator when you need a complete brand palette from scratch; use Color Mixer when you have two endpoints and want the intermediate values (shade ramps, gradient midpoints, transition states).

Question 6

Can the mixed color land outside sRGB gamut?

Accepted Answer

For sRGB Linear and HSL modes, no — both stay inside the sRGB gamut by construction. For OKLCH mode, in theory yes: OKLCH covers colors brighter or more saturated than sRGB can display, and naive linear interpolation could land outside. We clamp the output to sRGB range, which works correctly for the vast majority of color pairs. For wide-gamut displays (Display P3, BT.2020), the result would need further conversion — out of scope for this tool but a future enhancement.

Question 7

Why does the 9-step gradient look different between modes?

Accepted Answer

That is the whole point. Pick two complementary colors (blue + yellow) and switch between sRGB and OKLCH — the sRGB version passes through gray at the midpoint, the OKLCH version passes through green. Same start and end, different intermediate values. Use the gradient strip as a visual A/B test: whichever model produces transitions that LOOK right for your design is the right model to use. For most modern web use, that is OKLCH.

Question 8

Can I use the mixed color for accessibility?

Accepted Answer

Yes — if a brand color fails WCAG contrast against your background, mix it toward white (for darker backgrounds) or black (for lighter ones) until contrast passes. Use this with our Color Contrast Checker to find the exact ratio where the mix crosses the 4.5:1 threshold (WCAG AA body text) or 7:1 (WCAG AAA). This lets you preserve brand identity while meeting accessibility — far better than swapping to a generic dark-gray fallback.

Question 9

Is my color data sent anywhere?

Accepted Answer

No. The entire color-math pipeline (HEX parsing, gamma encoding, OKLab conversion, mixing) runs in JavaScript inside your browser tab. No fetch, no XHR, no analytics event. Verify by opening DevTools → Network and adjusting the slider — observe that no requests are made. Custom brand colors stay on your device.

Model	Best For	Watch Out For
sRGB Linear	Most cases; default behavior most design tools use	Mixing complementary colors (blue ↔ yellow, red ↔ green) passes through gray.
HSL Midpoint	Staying on the hue wheel; preserving saturation through mix	Lightness shifts can look muddy when the two colors have very different L values.
OKLCH	Perceptually uniform brightness; smoothest transitions	Larger compute cost; results may differ subtly from existing assets that were built in sRGB.

Free Color Mixer: Blend Two Colors With sRGB, HSL, or OKLCH Interpolation

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Precise Ratio Slider

Gradient Step Strip

100% Client-Side

Three Ways to Mix Two Colors — And When Each Matters

Three Blend Models, Compared

Where a Color Mixer Pays Off

The Gamma Encoding Trap

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