#66EAC4
Closest named color: Aqua Marine (#2EE8BB). oklch(85.3% 0.129 171.4), rgb(102, 234, 196).
Aa
Black text reads best on this color (14.13:1).
About this color
#66EAC4 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.129 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.033 away. Black text reads best on it, at 14.13:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 14.13:1 |
| White text | 1.48:1 |
Values
| HEX | #66EAC4 |
| RGB | rgb(102, 234, 196) |
| HSL | hsl(163, 76%, 66%) |
| OKLCH | oklch(85.3% 0.129 171.4) |
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 #66EAC4 | 1.48:1 | Fails | Lc -25.7 | Dividers and decoration only |
| Black text on #66EAC4 | 14.13:1 | AAA | Lc 81.1 | Fine for body text |
| #66EAC4 text on white | 1.48:1 | Fails | Lc 22.6 | Dividers and decoration only |
| #66EAC4 text on black | 14.13:1 | AAA | Lc -80.6 | 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
#E8FBF3
oklch(97.2% 0.023 168.8)
-
Step 100
100
#CBF5E6
oklch(93.6% 0.048 171.6)
-
Step 200
200 (this color)
#66EAC4
oklch(85.3% 0.129 171.4)
-
Step 300
300
#00E1B4
oklch(81% 0.158 171.4)
-
Step 400
400
#00BC96
oklch(70.8% 0.138 171.4)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#66EAC4 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) | #E4DCC2 | 0.133 |
| Deuteranopia (no green cones) | #D0CEC7 | 0.127 |
| Tritanopia (no blue cones) | #10ECDF | 0.043 |
| Achromatopsia (no color) | #D4D4D4 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66EAC4
#66EAC4
oklch(85.3% 0.129 171.4)
- #FFB6D6
#FFB6D6
oklch(85.3% 0.093 351.3)
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 #66EAC4, closest first.
No curated palette has a color within ΔE 0.04 of #66EAC4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.033
- Light Teal #90E4C1 ΔE 0.035
- Light Turquoise #7EF4CC ΔE 0.035
- Turquoise #40E0D0 ΔE 0.044
- Bright Teal #01F9C6 ΔE 0.047
- Hospital Green #9BE5AA ΔE 0.049
- Bright Aqua #0BF9EA ΔE 0.056
- Light Aquamarine #7BFDC7 ΔE 0.056
Use #66EAC4 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.