#66ECB9
Closest named color: Aqua Marine (#2EE8BB). oklch(85.5% 0.139 165.3), rgb(102, 236, 185).
Aa
Black text reads best on this color (14.26:1).
About this color
#66ECB9 is a light, moderately saturated green. In OKLCH its lightness is 85%, its chroma 0.139 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 14.26:1.
| Hue family | Greens |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 14.26:1 |
| White text | 1.47:1 |
Values
| HEX | #66ECB9 |
| RGB | rgb(102, 236, 185) |
| HSL | hsl(157, 78%, 66%) |
| OKLCH | oklch(85.5% 0.139 165.3) |
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 #66ECB9 | 1.47:1 | Fails | Lc -25.1 | Dividers and decoration only |
| Black text on #66ECB9 | 14.26:1 | AAA | Lc 81.7 | Fine for body text |
| #66ECB9 text on white | 1.47:1 | Fails | Lc 22.1 | Dividers and decoration only |
| #66ECB9 text on black | 14.26:1 | 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
#E7FBF2
oklch(97.1% 0.024 167.1)
-
Step 100
100
#CBF6E1
oklch(93.7% 0.053 164.2)
-
Step 200
200 (this color)
#66ECB9
oklch(85.5% 0.139 165.3)
-
Step 300
300
#00E2A6
oklch(80.9% 0.169 165.5)
-
Step 400
400
#00BD8A
oklch(70.8% 0.148 165.3)
-
Step 500
500
#00A276
oklch(63.1% 0.132 165.5)
-
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
#005E43
oklch(42.7% 0.089 165.5)
-
Step 900
900
#004E37
oklch(37.6% 0.079 165.5)
-
Step 950
950
#002F20
oklch(27.1% 0.056 165.8)
#66ECB9 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) | #E8DDB6 | 0.138 |
| Deuteranopia (no green cones) | #D4CFBC | 0.133 |
| Tritanopia (no blue cones) | #22ECDE | 0.054 |
| Achromatopsia (no color) | #D5D5D5 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ECB9
#66ECB9
oklch(85.5% 0.139 165.3)
- #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 #66ECB9, closest first.
No curated palette has a color within ΔE 0.04 of #66ECB9.
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 0.037
- Bright Teal #01F9C6 ΔE 0.040
- Light Teal #90E4C1 ΔE 0.043
- Hospital Green #9BE5AA ΔE 0.044
- Seafoam Green #7AF9AB ΔE 0.048
- Seafoam #80F9AD ΔE 0.049
- Light Blue Green #7EFBB3 ΔE 0.050
Use #66ECB9 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.