#66E5DA
Closest named color: Turquoise (#40E0D0). oklch(84.7% 0.114 187.5), rgb(102, 229, 218).
Aa
Black text reads best on this color (13.78:1).
About this color
#66E5DA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.114 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.031 away. Black text reads best on it, at 13.78:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.78:1 |
| White text | 1.52:1 |
Values
| HEX | #66E5DA |
| RGB | rgb(102, 229, 218) |
| HSL | hsl(175, 71%, 65%) |
| OKLCH | oklch(84.7% 0.114 187.5) |
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 #66E5DA | 1.52:1 | Fails | Lc -27.3 | Dividers and decoration only |
| Black text on #66E5DA | 13.78:1 | AAA | Lc 79.7 | Fine for body text |
| #66E5DA text on white | 1.52:1 | Fails | Lc 24.0 | Dividers and decoration only |
| #66E5DA text on black | 13.78:1 | AAA | Lc -79.1 | 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
#E8FAF8
oklch(97.1% 0.019 188.8)
-
Step 100
100
#CBF4EF
oklch(93.7% 0.043 187.4)
-
Step 200
200 (this color)
#66E5DA
oklch(84.7% 0.114 187.5)
-
Step 300
300
#00DDD1
oklch(80.9% 0.141 187.9)
-
Step 400
400
#00B9AE
oklch(70.8% 0.123 187.3)
-
Step 500
500
#009E95
oklch(63% 0.11 187.7)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D48
oklch(37.8% 0.066 187.3)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#66E5DA 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) | #DADADA | 0.121 |
| Deuteranopia (no green cones) | #C6CBDB | 0.114 |
| Tritanopia (no blue cones) | #00EAE1 | 0.033 |
| Achromatopsia (no color) | #D1D1D1 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E5DA
#66E5DA
oklch(84.7% 0.114 187.5)
- #FFB6C3
#FFB6C3
oklch(84.8% 0.086 7.3)
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 #66E5DA, closest first.
No curated palette has a color within ΔE 0.04 of #66E5DA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.031
- Light Teal #90E4C1 ΔE 0.044
- Robin's Egg #6DEDFD ΔE 0.050
- Bright Aqua #0BF9EA ΔE 0.055
- Light Turquoise #7EF4CC ΔE 0.055
- Bright Light Blue #26F7FD ΔE 0.057
- Aqua Marine #2EE8BB ΔE 0.058
- Tiffany Blue #94D2BD ΔE 0.060
Use #66E5DA 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.