#66E5FA
Closest named color: Robin's Egg (#6DEDFD). oklch(85.8% 0.115 210), rgb(102, 229, 250).
Aa
Black text reads best on this color (14.15:1).
About this color
#66E5FA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 86%, its chroma 0.115 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.023 away. Black text reads best on it, at 14.15:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.15:1 |
| White text | 1.48:1 |
Values
| HEX | #66E5FA |
| RGB | rgb(102, 229, 250) |
| HSL | hsl(189, 94%, 69%) |
| OKLCH | oklch(85.8% 0.115 210) |
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 #66E5FA | 1.48:1 | Fails | Lc -25.6 | Dividers and decoration only |
| Black text on #66E5FA | 14.15:1 | AAA | Lc 81.2 | Fine for body text |
| #66E5FA text on white | 1.48:1 | Fails | Lc 22.5 | Dividers and decoration only |
| #66E5FA text on black | 14.15:1 | AAA | Lc -80.7 | 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
#E7F9FD
oklch(97% 0.02 212.5)
-
Step 100
100
#CAF2FA
oklch(93.5% 0.043 211.1)
-
Step 200
200 (this color)
#66E5FA
oklch(85.8% 0.115 210)
-
Step 300
300
#00D8F2
oklch(80.8% 0.14 210.1)
-
Step 400
400
#00B5CA
oklch(70.8% 0.122 209.4)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#66E5FA 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) | #D3DDFB | 0.110 |
| Deuteranopia (no green cones) | #BCCDFA | 0.099 |
| Tritanopia (no blue cones) | #00EFEB | 0.051 |
| Achromatopsia (no color) | #D4D4D4 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E5FA
#66E5FA
oklch(85.8% 0.115 210)
- #FFBEB3
#FFBEB3
oklch(85.8% 0.077 29.6)
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 #66E5FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.023
- Robin Egg Blue #8AF1FE ΔE 0.046
- Bright Light Blue #26F7FD ΔE 0.051
- Robin's Egg Blue #98EFF9 ΔE 0.053
- Aqua Blue #02D8E9 ΔE 0.059
- Sky Blue #87CEEB ΔE 0.061
- Bright Cyan #41FDFE ΔE 0.064
- Light Sky Blue #87CEFA ΔE 0.065
Use #66E5FA 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.