#66DEFA
Closest named color: Robin's Egg (#6DEDFD). oklch(84.2% 0.114 215.5), rgb(102, 222, 250).
Aa
Black text reads best on this color (13.39:1).
About this color
#66DEFA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.114 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.042 away. Black text reads best on it, at 13.39:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 13.39:1 |
| White text | 1.56:1 |
Values
| HEX | #66DEFA |
| RGB | rgb(102, 222, 250) |
| HSL | hsl(191, 94%, 69%) |
| OKLCH | oklch(84.2% 0.114 215.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #66DEFA | 1.56:1 | Fails | Lc -29.0 | Dividers and decoration only |
| Black text on #66DEFA | 13.39:1 | AAA | Lc 78.1 | Fine for body text |
| #66DEFA text on white | 1.56:1 | Fails | Lc 25.7 | Dividers and decoration only |
| #66DEFA text on black | 13.39:1 | AAA | Lc -77.4 | Fine for body text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#EBF8FC
oklch(97.1% 0.015 218)
-
Step 100
100
#D2F0F8
oklch(93.6% 0.033 215.6)
-
Step 200
200
#AAE4F4
oklch(88.5% 0.063 216.6)
-
Step 300
300 (this color)
#66DEFA
oklch(84.2% 0.114 215.5)
-
Step 400
400
#00B3D1
oklch(70.6% 0.125 215.4)
-
Step 500
500
#009AB4
oklch(63.2% 0.112 215.3)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#66DEFA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #CAD8FC | 0.101 |
| Deuteranopia (no green cones) | #B5C7FA | 0.093 |
| Tritanopia (no blue cones) | #00E8E7 | 0.056 |
| Achromatopsia (no color) | #CECECE | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DEFA
#66DEFA
oklch(84.2% 0.114 215.5)
- #FFB7A4
#FFB7A4
oklch(84.2% 0.088 35.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #66DEFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.042
- Sky Blue #87CEEB ΔE 0.046
- Light Sky Blue #87CEFA ΔE 0.048
- Aqua Blue #02D8E9 ΔE 0.050
- Sky #82CAFC ΔE 0.057
- Lightblue #7BC8F6 ΔE 0.059
- Vivid Sky Blue #4CC9F0 ΔE 0.062
- Robin Egg Blue #8AF1FE ΔE 0.062
Use #66DEFA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.