#66DCDE
Closest named color: Turquoise (#40E0D0). oklch(82.8% 0.106 196.8), rgb(102, 220, 222).
Aa
Black text reads best on this color (12.85:1).
About this color
#66DCDE is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.106 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.035 away. Black text reads best on it, at 12.85:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.85:1 |
| White text | 1.63:1 |
Values
| HEX | #66DCDE |
| RGB | rgb(102, 220, 222) |
| HSL | hsl(181, 65%, 64%) |
| OKLCH | oklch(82.8% 0.106 196.8) |
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 #66DCDE | 1.63:1 | Fails | Lc -31.6 | Non-text elements, placeholder text |
| Black text on #66DCDE | 12.85:1 | AAA | Lc 75.8 | Fine for body text |
| #66DCDE text on white | 1.63:1 | Fails | Lc 28.0 | Dividers and decoration only |
| #66DCDE text on black | 12.85:1 | AAA | Lc -75.0 | Content text, not long reading |
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
#EBF9F9
oklch(97.2% 0.015 196.9)
-
Step 100
100
#D3F1F1
oklch(93.7% 0.031 196.6)
-
Step 200
200
#ACE6E6
oklch(88.6% 0.059 196.1)
-
Step 300
300 (this color)
#66DCDE
oklch(82.8% 0.106 196.8)
-
Step 400
400
#00B7BA
oklch(70.7% 0.12 196.9)
-
Step 500
500
#009DA0
oklch(63.1% 0.107 197.2)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#66DCDE 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) | #CFD3DE | 0.110 |
| Deuteranopia (no green cones) | #BBC4DF | 0.103 |
| Tritanopia (no blue cones) | #00E2DC | 0.038 |
| Achromatopsia (no color) | #CACACA | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DCDE
#66DCDE
oklch(82.8% 0.106 196.8)
- #FFADB0
#FFADB0
oklch(82.7% 0.097 17)
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 #66DCDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.035
- Aqua Blue #02D8E9 ΔE 0.042
- Medium Turquoise #48D1CC ΔE 0.043
- Tiffany Blue #94D2BD ΔE 0.054
- Seafoam Blue #78D1B6 ΔE 0.054
- Sky Blue #87CEEB ΔE 0.054
- Robin's Egg #6DEDFD ΔE 0.056
- Celeste #A8DADC ΔE 0.061
Use #66DCDE 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.