#66E3CD
Closest named color: Turquoise (#40E0D0). oklch(83.9% 0.116 180), rgb(102, 227, 205).
Aa
Black text reads best on this color (13.43:1).
About this color
#66E3CD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.116 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.024 away. Black text reads best on it, at 13.43:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.43:1 |
| White text | 1.56:1 |
Values
| HEX | #66E3CD |
| RGB | rgb(102, 227, 205) |
| HSL | hsl(169, 69%, 65%) |
| OKLCH | oklch(83.9% 0.116 180) |
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 #66E3CD | 1.56:1 | Fails | Lc -28.9 | Dividers and decoration only |
| Black text on #66E3CD | 13.43:1 | AAA | Lc 78.3 | Fine for body text |
| #66E3CD text on white | 1.56:1 | Fails | Lc 25.5 | Dividers and decoration only |
| #66E3CD text on black | 13.43:1 | AAA | Lc -77.6 | 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
#EBF9F6
oklch(97.1% 0.015 181.8)
-
Step 100
100
#D3F2EB
oklch(93.7% 0.034 180.4)
-
Step 200
200
#AAE8DB
oklch(88.5% 0.065 180.3)
-
Step 300
300 (this color)
#66E3CD
oklch(83.9% 0.116 180)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005D51
oklch(42.9% 0.078 180)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#66E3CD 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) | #DAD7CC | 0.123 |
| Deuteranopia (no green cones) | #C7C9CF | 0.117 |
| Tritanopia (no blue cones) | #00E6DC | 0.035 |
| Achromatopsia (no color) | #CFCFCF | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E3CD
#66E3CD
oklch(83.9% 0.116 180)
- #FFB0C7
#FFB0C7
oklch(83.9% 0.096 0.4)
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 #66E3CD, closest first.
No curated palette has a color within ΔE 0.04 of #66E3CD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.024
- Light Teal #90E4C1 ΔE 0.037
- Aqua Marine #2EE8BB ΔE 0.044
- Seafoam Blue #78D1B6 ΔE 0.049
- Tiffany Blue #94D2BD ΔE 0.053
- Light Turquoise #7EF4CC ΔE 0.054
- Medium Turquoise #48D1CC ΔE 0.057
- Bright Aqua #0BF9EA ΔE 0.061
Use #66E3CD 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.