#66E6E1
Closest named color: Turquoise (#40E0D0). oklch(85.2% 0.113 191.7), rgb(102, 230, 225).
Aa
Black text reads best on this color (13.97:1).
About this color
#66E6E1 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.113 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.037 away. Black text reads best on it, at 13.97:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.97:1 |
| White text | 1.50:1 |
Values
| HEX | #66E6E1 |
| RGB | rgb(102, 230, 225) |
| HSL | hsl(178, 72%, 65%) |
| OKLCH | oklch(85.2% 0.113 191.7) |
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 #66E6E1 | 1.50:1 | Fails | Lc -26.4 | Dividers and decoration only |
| Black text on #66E6E1 | 13.97:1 | AAA | Lc 80.5 | Fine for body text |
| #66E6E1 text on white | 1.50:1 | Fails | Lc 23.3 | Dividers and decoration only |
| #66E6E1 text on black | 13.97:1 | AAA | Lc -79.9 | 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 200.
-
Step 50
50
#E7FAF9
oklch(97.1% 0.02 193)
-
Step 100
100
#CBF3F1
oklch(93.5% 0.041 192.7)
-
Step 200
200 (this color)
#66E6E1
oklch(85.2% 0.113 191.7)
-
Step 300
300
#00DCD7
oklch(80.8% 0.139 191.8)
-
Step 400
400
#00B8B4
oklch(70.7% 0.121 192)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706D
oklch(49.2% 0.085 191.5)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#66E6E1 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) | #DADCE1 | 0.120 |
| Deuteranopia (no green cones) | #C5CCE2 | 0.112 |
| Tritanopia (no blue cones) | #00ECE4 | 0.034 |
| Achromatopsia (no color) | #D3D3D3 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66E6E1
#66E6E1
oklch(85.2% 0.113 191.7)
- #FFB9C0
#FFB9C0
oklch(85.2% 0.082 12.3)
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 #66E6E1, closest first.
No curated palette has a color within ΔE 0.04 of #66E6E1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.037
- Robin's Egg #6DEDFD ΔE 0.040
- Light Teal #90E4C1 ΔE 0.050
- Bright Light Blue #26F7FD ΔE 0.051
- Bright Aqua #0BF9EA ΔE 0.053
- Robin Egg Blue #8AF1FE ΔE 0.057
- Light Turquoise #7EF4CC ΔE 0.059
- Aqua Blue #02D8E9 ΔE 0.060
Use #66E6E1 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.