#66DFE8
Closest named color: Robin's Egg (#6DEDFD). oklch(83.8% 0.109 201.9), rgb(102, 223, 232).
Aa
Black text reads best on this color (13.28:1).
About this color
#66DFE8 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.109 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.043 away. Black text reads best on it, at 13.28:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 13.28:1 |
| White text | 1.58:1 |
Values
| HEX | #66DFE8 |
| RGB | rgb(102, 223, 232) |
| HSL | hsl(184, 74%, 65%) |
| OKLCH | oklch(83.8% 0.109 201.9) |
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 #66DFE8 | 1.58:1 | Fails | Lc -29.6 | Dividers and decoration only |
| Black text on #66DFE8 | 13.28:1 | AAA | Lc 77.6 | Fine for body text |
| #66DFE8 text on white | 1.58:1 | Fails | Lc 26.1 | Dividers and decoration only |
| #66DFE8 text on black | 13.28:1 | AAA | Lc -76.9 | 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
#EBF9FA
oklch(97.2% 0.015 202.1)
-
Step 100
100
#D3F1F3
oklch(93.7% 0.031 201.5)
-
Step 200
200
#AAE6EA
oklch(88.6% 0.061 201.3)
-
Step 300
300 (this color)
#66DFE8
oklch(83.8% 0.109 201.9)
-
Step 400
400
#00B6C0
oklch(70.7% 0.12 201.8)
-
Step 500
500
#009CA5
oklch(63.1% 0.107 202)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#66DFE8 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) | #D0D6E9 | 0.110 |
| Deuteranopia (no green cones) | #BCC7E9 | 0.102 |
| Tritanopia (no blue cones) | #00E7E1 | 0.042 |
| Achromatopsia (no color) | #CECECE | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DFE8
#66DFE8
oklch(83.8% 0.109 201.9)
- #FFB3B0
#FFB3B0
oklch(83.8% 0.089 21.7)
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 #66DFE8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.043
- Turquoise #40E0D0 ΔE 0.044
- Aqua Blue #02D8E9 ΔE 0.044
- Sky Blue #87CEEB ΔE 0.053
- Medium Turquoise #48D1CC ΔE 0.056
- Celeste #A8DADC ΔE 0.059
- Bright Light Blue #26F7FD ΔE 0.063
- Robin Egg Blue #8AF1FE ΔE 0.063
Use #66DFE8 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.