#66EDF2
Closest named color: Robin's Egg (#6DEDFD). oklch(87.4% 0.117 198.6), rgb(102, 237, 242).
Aa
Black text reads best on this color (14.96:1).
About this color
#66EDF2 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 87%, its chroma 0.117 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.017 away. Black text reads best on it, at 14.96:1.
| Hue family | Teals and cyans |
| Lightness | light (87%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.96:1 |
| White text | 1.40:1 |
Values
| HEX | #66EDF2 |
| RGB | rgb(102, 237, 242) |
| HSL | hsl(182, 84%, 67%) |
| OKLCH | oklch(87.4% 0.117 198.6) |
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 #66EDF2 | 1.40:1 | Fails | Lc -22.0 | Dividers and decoration only |
| Black text on #66EDF2 | 14.96:1 | AAA | Lc 84.4 | Fine for body text |
| #66EDF2 text on white | 1.40:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #66EDF2 text on black | 14.96:1 | AAA | Lc -84.2 | 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 200.
-
Step 50
50
#E7FAFA
oklch(97.1% 0.02 196.8)
-
Step 100
100
#C9F3F5
oklch(93.5% 0.043 200)
-
Step 200
200 (this color)
#66EDF2
oklch(87.4% 0.117 198.6)
-
Step 300
300
#00DBE1
oklch(80.9% 0.138 198.3)
-
Step 400
400
#00B7BC
oklch(70.8% 0.12 198.3)
-
Step 500
500
#009DA1
oklch(63.2% 0.107 198)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#66EDF2 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) | #DEE3F3 | 0.121 |
| Deuteranopia (no green cones) | #C8D3F3 | 0.112 |
| Tritanopia (no blue cones) | #00F5EE | 0.038 |
| Achromatopsia (no color) | #DADADA | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66EDF2
#66EDF2
oklch(87.4% 0.117 198.6)
- #FFC4C4
#FFC4C4
oklch(87.3% 0.068 18.5)
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 #66EDF2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.017
- Bright Light Blue #26F7FD ΔE 0.033
- Robin Egg Blue #8AF1FE ΔE 0.036
- Bright Cyan #41FDFE ΔE 0.042
- Robin's Egg Blue #98EFF9 ΔE 0.044
- Bright Aqua #0BF9EA ΔE 0.047
- Bright Turquoise #0FFEF9 ΔE 0.048
- Cyan #00FFFF ΔE 0.050
Use #66EDF2 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.