#66ECDB
Closest named color: Light Turquoise (#7EF4CC). oklch(86.4% 0.12 183.9), rgb(102, 236, 219).
Aa
Black text reads best on this color (14.58:1).
About this color
#66ECDB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 86%, its chroma 0.120 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Light Turquoise (#7EF4CC), ΔE 0.039 away. Black text reads best on it, at 14.58:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Light Turquoise (#7EF4CC) |
| Black text | 14.58:1 |
| White text | 1.43:1 |
Values
| HEX | #66ECDB |
| RGB | rgb(102, 236, 219) |
| HSL | hsl(172, 78%, 66%) |
| OKLCH | oklch(86.4% 0.12 183.9) |
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 #66ECDB | 1.43:1 | Fails | Lc -23.6 | Dividers and decoration only |
| Black text on #66ECDB | 14.58:1 | AAA | Lc 83.0 | Fine for body text |
| #66ECDB text on white | 1.43:1 | Fails | Lc 20.8 | Dividers and decoration only |
| #66ECDB text on black | 14.58:1 | AAA | Lc -82.6 | 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 200.
-
Step 50
50
#E7FAF7
oklch(97% 0.02 185.5)
-
Step 100
100
#CAF4ED
oklch(93.6% 0.044 184.2)
-
Step 200
200 (this color)
#66ECDB
oklch(86.4% 0.12 183.9)
-
Step 300
300
#00DECB
oklch(80.9% 0.143 184)
-
Step 400
400
#00B9A9
oklch(70.6% 0.125 184)
-
Step 500
500
#009F91
oklch(63.1% 0.112 184)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#66ECDB 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) | #E2E0DA | 0.128 |
| Deuteranopia (no green cones) | #CDD1DD | 0.121 |
| Tritanopia (no blue cones) | #00F0E7 | 0.032 |
| Achromatopsia (no color) | #D7D7D7 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ECDB
#66ECDB
oklch(86.4% 0.12 183.9)
- #FFBECC
#FFBECC
oklch(86.4% 0.077 4.5)
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 #66ECDB, closest first.
No curated palette has a color within ΔE 0.04 of #66ECDB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Turquoise #7EF4CC ΔE 0.039
- Bright Aqua #0BF9EA ΔE 0.040
- Light Teal #90E4C1 ΔE 0.042
- Turquoise #40E0D0 ΔE 0.043
- Bright Light Blue #26F7FD ΔE 0.048
- Robin's Egg #6DEDFD ΔE 0.049
- Bright Turquoise #0FFEF9 ΔE 0.054
- Bright Cyan #41FDFE ΔE 0.054
Use #66ECDB 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.