#66ECAF
Closest named color: Aqua Marine (#2EE8BB). oklch(85.2% 0.147 161), rgb(102, 236, 175).
Aa
Black text reads best on this color (14.18:1).
About this color
#66ECAF is a light, vivid green. In OKLCH its lightness is 85%, its chroma 0.147 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.034 away. Black text reads best on it, at 14.18:1.
| Hue family | Greens |
| Lightness | light (85%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 14.18:1 |
| White text | 1.48:1 |
Values
| HEX | #66ECAF |
| RGB | rgb(102, 236, 175) |
| HSL | hsl(153, 78%, 66%) |
| OKLCH | oklch(85.2% 0.147 161) |
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 #66ECAF | 1.48:1 | Fails | Lc -25.4 | Dividers and decoration only |
| Black text on #66ECAF | 14.18:1 | AAA | Lc 81.3 | Fine for body text |
| #66ECAF text on white | 1.48:1 | Fails | Lc 22.4 | Dividers and decoration only |
| #66ECAF text on black | 14.18:1 | AAA | Lc -80.9 | 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
#E8FBF0
oklch(97.1% 0.025 160.6)
-
Step 100
100
#CBF6DE
oklch(93.6% 0.055 160.7)
-
Step 200
200 (this color)
#66ECAF
oklch(85.2% 0.147 161)
-
Step 300
300
#00E39A
oklch(80.9% 0.18 161.1)
-
Step 400
400
#00BE80
oklch(70.8% 0.158 161)
-
Step 500
500
#00A36D
oklch(63.2% 0.141 160.9)
-
Step 600
600
#00895B
oklch(55.6% 0.124 161)
-
Step 700
700
#00734C
oklch(49.1% 0.109 161.2)
-
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)
#66ECAF 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) | #E9DCAC | 0.141 |
| Deuteranopia (no green cones) | #D6CFB3 | 0.136 |
| Tritanopia (no blue cones) | #2DEBDB | 0.062 |
| Achromatopsia (no color) | #D4D4D4 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ECAF
#66ECAF
oklch(85.2% 0.147 161)
- #FFB3E3
#FFB3E3
oklch(85.2% 0.107 341.3)
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 #66ECAF, closest first.
No curated palette has a color within ΔE 0.04 of #66ECAF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.034
- Bright Teal #01F9C6 ΔE 0.042
- Seafoam Green #7AF9AB ΔE 0.042
- Seafoam #80F9AD ΔE 0.044
- Hospital Green #9BE5AA ΔE 0.045
- Light Turquoise #7EF4CC ΔE 0.047
- Light Blue Green #7EFBB3 ΔE 0.047
- Greenish Turquoise #00FBB0 ΔE 0.048
Use #66ECAF 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.