#66E4FE
Closest named color: Robin's Egg (#6DEDFD). oklch(85.7% 0.116 213.4), rgb(102, 228, 254).
Aa
Black text reads best on this color (14.09:1).
About this color
#66E4FE is a light, moderately saturated teal or cyan. In OKLCH its lightness is 86%, its chroma 0.116 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.026 away. Black text reads best on it, at 14.09:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.09:1 |
| White text | 1.49:1 |
Values
| HEX | #66E4FE |
| RGB | rgb(102, 228, 254) |
| HSL | hsl(190, 99%, 70%) |
| OKLCH | oklch(85.7% 0.116 213.4) |
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 #66E4FE | 1.49:1 | Fails | Lc -25.9 | Dividers and decoration only |
| Black text on #66E4FE | 14.09:1 | AAA | Lc 81.0 | Fine for body text |
| #66E4FE text on white | 1.49:1 | Fails | Lc 22.8 | Dividers and decoration only |
| #66E4FE text on black | 14.09:1 | AAA | Lc -80.5 | 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
#E7F9FE
oklch(97% 0.02 216.2)
-
Step 100
100
#CAF2FB
oklch(93.6% 0.043 212.9)
-
Step 200
200 (this color)
#66E4FE
oklch(85.7% 0.116 213.4)
-
Step 300
300
#00D7F7
oklch(80.8% 0.142 213.5)
-
Step 400
400
#00B4CF
oklch(70.8% 0.124 213.4)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#66E4FE 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) | #D0DDFF | 0.106 |
| Deuteranopia (no green cones) | #BACCFE | 0.097 |
| Tritanopia (no blue cones) | #00EEEC | 0.054 |
| Achromatopsia (no color) | #D3D3D3 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E4FE
#66E4FE
oklch(85.7% 0.116 213.4)
- #FFBEAF
#FFBEAF
oklch(85.7% 0.078 33.3)
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 #66E4FE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.026
- Robin Egg Blue #8AF1FE ΔE 0.049
- Bright Light Blue #26F7FD ΔE 0.055
- Robin's Egg Blue #98EFF9 ΔE 0.055
- Sky Blue #87CEEB ΔE 0.059
- Aqua Blue #02D8E9 ΔE 0.059
- Light Sky Blue #87CEFA ΔE 0.060
- Celeste #A8DADC ΔE 0.068
Use #66E4FE 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.