#66E6FF
Closest named color: Robin's Egg (#6DEDFD). oklch(86.2% 0.117 212.5), rgb(102, 230, 255).
Aa
Black text reads best on this color (14.32:1).
About this color
#66E6FF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 86%, its chroma 0.117 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.022 away. Black text reads best on it, at 14.32:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.32:1 |
| White text | 1.46:1 |
Values
| HEX | #66E6FF |
| RGB | rgb(102, 230, 255) |
| HSL | hsl(190, 100%, 70%) |
| OKLCH | oklch(86.2% 0.117 212.5) |
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 #66E6FF | 1.46:1 | Fails | Lc -24.8 | Dividers and decoration only |
| Black text on #66E6FF | 14.32:1 | AAA | Lc 81.9 | Fine for body text |
| #66E6FF text on white | 1.46:1 | Fails | Lc 21.8 | Dividers and decoration only |
| #66E6FF text on black | 14.32:1 | AAA | Lc -81.5 | 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
#E7F9FD
oklch(97% 0.02 212.5)
-
Step 100
100
#CAF2FB
oklch(93.6% 0.043 212.9)
-
Step 200
200 (this color)
#66E6FF
oklch(86.2% 0.117 212.5)
-
Step 300
300
#00D8F6
oklch(81% 0.141 212.3)
-
Step 400
400
#00B4CE
oklch(70.7% 0.124 212.8)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#66E6FF 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) | #D3DFFF | 0.108 |
| Deuteranopia (no green cones) | #BCCEFF | 0.098 |
| Tritanopia (no blue cones) | #00F0EE | 0.053 |
| Achromatopsia (no color) | #D5D5D5 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E6FF
#66E6FF
oklch(86.2% 0.117 212.5)
- #FFC0B3
#FFC0B3
oklch(86.2% 0.075 31.9)
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 #66E6FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.022
- Robin Egg Blue #8AF1FE ΔE 0.044
- Bright Light Blue #26F7FD ΔE 0.051
- Robin's Egg Blue #98EFF9 ΔE 0.052
- Aqua Blue #02D8E9 ΔE 0.063
- Sky Blue #87CEEB ΔE 0.063
- Bright Cyan #41FDFE ΔE 0.063
- Light Sky Blue #87CEFA ΔE 0.065
Use #66E6FF 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.