#66F1B4
Closest named color: Seafoam Green (#7AF9AB). oklch(86.6% 0.15 161.8), rgb(102, 241, 180).
Aa
Black text reads best on this color (14.80:1).
About this color
#66F1B4 is a light, vivid green. In OKLCH its lightness is 87%, its chroma 0.150 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seafoam Green (#7AF9AB), ΔE 0.032 away. Black text reads best on it, at 14.80:1.
| Hue family | Greens |
| Lightness | light (87%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Seafoam Green (#7AF9AB) |
| Black text | 14.80:1 |
| White text | 1.41:1 |
Values
| HEX | #66F1B4 |
| RGB | rgb(102, 241, 180) |
| HSL | hsl(154, 83%, 67%) |
| OKLCH | oklch(86.6% 0.15 161.8) |
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 #66F1B4 | 1.41:1 | Fails | Lc -22.6 | Dividers and decoration only |
| Black text on #66F1B4 | 14.80:1 | AAA | Lc 83.9 | Fine for body text |
| #66F1B4 text on white | 1.41:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #66F1B4 text on black | 14.80:1 | AAA | Lc -83.6 | 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
#E7FBF0
oklch(97% 0.025 162)
-
Step 100
100
#CAF6DE
oklch(93.6% 0.056 161.3)
-
Step 200
200 (this color)
#66F1B4
oklch(86.6% 0.15 161.8)
-
Step 300
300
#00E39C
oklch(80.9% 0.178 161.7)
-
Step 400
400
#00BE82
oklch(70.8% 0.156 161.8)
-
Step 500
500
#00A36F
oklch(63.2% 0.139 161.8)
-
Step 600
600
#00895C
oklch(55.7% 0.123 161.5)
-
Step 700
700
#00734D
oklch(49.1% 0.108 161.8)
-
Step 800
800
#005E3E
oklch(42.6% 0.094 161.6)
-
Step 900
900
#004F33
oklch(37.8% 0.084 161.3)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#66F1B4 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) | #EEE1B1 | 0.144 |
| Deuteranopia (no green cones) | #DAD3B8 | 0.139 |
| Tritanopia (no blue cones) | #24F1E0 | 0.061 |
| Achromatopsia (no color) | #D9D9D9 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66F1B4
#66F1B4
oklch(86.6% 0.15 161.8)
- #FFBAE5
#FFBAE5
oklch(86.5% 0.096 341.5)
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 #66F1B4, closest first.
No curated palette has a color within ΔE 0.04 of #66F1B4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seafoam Green #7AF9AB ΔE 0.032
- Seafoam #80F9AD ΔE 0.033
- Bright Teal #01F9C6 ΔE 0.034
- Light Blue Green #7EFBB3 ΔE 0.035
- Light Turquoise #7EF4CC ΔE 0.039
- Greenish Cyan #2AFEB7 ΔE 0.039
- Greenish Turquoise #00FBB0 ΔE 0.041
- Aqua Marine #2EE8BB ΔE 0.042
Use #66F1B4 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.