#66ECB8
Closest named color: Aqua Marine (#2EE8BB). oklch(85.5% 0.14 164.8), rgb(102, 236, 184).
Aa
Black text reads best on this color (14.25:1).
About this color
#66ECB8 is a light, vivid green. In OKLCH its lightness is 85%, its chroma 0.140 and its hue 165°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.031 away. Black text reads best on it, at 14.25:1.
| Hue family | Greens |
| Lightness | light (85%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 14.25:1 |
| White text | 1.47:1 |
Values
| HEX | #66ECB8 |
| RGB | rgb(102, 236, 184) |
| HSL | hsl(157, 78%, 66%) |
| OKLCH | oklch(85.5% 0.14 164.8) |
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 #66ECB8 | 1.47:1 | Fails | Lc -25.1 | Dividers and decoration only |
| Black text on #66ECB8 | 14.25:1 | AAA | Lc 81.6 | Fine for body text |
| #66ECB8 text on white | 1.47:1 | Fails | Lc 22.1 | Dividers and decoration only |
| #66ECB8 text on black | 14.25:1 | AAA | Lc -81.2 | 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
#E7FBF1
oklch(97.1% 0.025 164.5)
-
Step 100
100
#CBF6E1
oklch(93.7% 0.053 164.2)
-
Step 200
200 (this color)
#66ECB8
oklch(85.5% 0.14 164.8)
-
Step 300
300
#00E2A4
oklch(80.9% 0.171 164.7)
-
Step 400
400
#00BD89
oklch(70.7% 0.149 164.9)
-
Step 500
500
#00A275
oklch(63.1% 0.133 165)
-
Step 600
600
#008862
oklch(55.5% 0.117 165.2)
-
Step 700
700
#007352
oklch(49.2% 0.104 164.9)
-
Step 800
800
#005E42
oklch(42.7% 0.09 164.7)
-
Step 900
900
#004E37
oklch(37.6% 0.079 165.5)
-
Step 950
950
#002F1F
oklch(27% 0.057 164.4)
#66ECB8 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) | #E8DDB5 | 0.139 |
| Deuteranopia (no green cones) | #D4CFBB | 0.133 |
| Tritanopia (no blue cones) | #23ECDD | 0.054 |
| Achromatopsia (no color) | #D5D5D5 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ECB8
#66ECB8
oklch(85.5% 0.14 164.8)
- #FFB5DE
#FFB5DE
oklch(85.4% 0.1 345.1)
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 #66ECB8, closest first.
No curated palette has a color within ΔE 0.04 of #66ECB8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.031
- Light Turquoise #7EF4CC ΔE 0.038
- Bright Teal #01F9C6 ΔE 0.040
- Light Teal #90E4C1 ΔE 0.044
- Hospital Green #9BE5AA ΔE 0.044
- Seafoam Green #7AF9AB ΔE 0.048
- Seafoam #80F9AD ΔE 0.048
- Light Blue Green #7EFBB3 ΔE 0.049
Use #66ECB8 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.