#66DE8A
Closest named color: Aqua Green (#12E193). oklch(81.1% 0.161 151.1), rgb(102, 222, 138).
Aa
Black text reads best on this color (12.38:1).
About this color
#66DE8A is a light, vivid green. In OKLCH its lightness is 81%, its chroma 0.161 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Green (#12E193), ΔE 0.033 away. Black text reads best on it, at 12.38:1.
| Hue family | Greens |
| Lightness | light (81%) |
| Chroma | vivid (0.161) |
| Temperature | in between |
| Nearest name | Aqua Green (#12E193) |
| Black text | 12.38:1 |
| White text | 1.69:1 |
Values
| HEX | #66DE8A |
| RGB | rgb(102, 222, 138) |
| HSL | hsl(138, 65%, 64%) |
| OKLCH | oklch(81.1% 0.161 151.1) |
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 #66DE8A | 1.69:1 | Fails | Lc -33.7 | Non-text elements, placeholder text |
| Black text on #66DE8A | 12.38:1 | AAA | Lc 73.8 | Content text, not long reading |
| #66DE8A text on white | 1.69:1 | Fails | Lc 30.0 | Dividers and decoration only |
| #66DE8A text on black | 12.38:1 | AAA | Lc -72.8 | Content text, not long reading |
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 300.
-
Step 50
50
#ECFAEE
oklch(97.1% 0.022 149.7)
-
Step 100
100
#D4F3DA
oklch(93.5% 0.047 151)
-
Step 200
200
#AEEBBB
oklch(88.6% 0.09 150.8)
-
Step 300
300 (this color)
#66DE8A
oklch(81.1% 0.161 151.1)
-
Step 400
400
#00C05E
oklch(70.7% 0.19 151)
-
Step 500
500
#00A550
oklch(63.2% 0.17 151.1)
-
Step 600
600
#008B42
oklch(55.7% 0.15 151)
-
Step 700
700
#007537
oklch(49.2% 0.132 151.1)
-
Step 800
800
#00602C
oklch(42.8% 0.115 151.2)
-
Step 900
900
#005023
oklch(37.7% 0.102 150.9)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#66DE8A 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) | #DFCE84 | 0.136 |
| Deuteranopia (no green cones) | #CEC28F | 0.133 |
| Tritanopia (no blue cones) | #48DBC9 | 0.087 |
| Achromatopsia (no color) | #C7C7C7 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DE8A
#66DE8A
oklch(81.1% 0.161 151.1)
- #FC98F1
#FC98F1
oklch(81.1% 0.162 331)
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 #66DE8A, closest first.
No curated palette has a color within ΔE 0.04 of #66DE8A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Green #12E193 ΔE 0.033
- Weird Green #3AE57F ΔE 0.036
- Emerald #06D6A0 ΔE 0.055
- Seaweed #18D17B ΔE 0.059
- Fresh Green #69D84F ΔE 0.059
- Aqua Marine #2EE8BB ΔE 0.060
- Light Green #90EE90 ΔE 0.061
- Turquoise Green #04F489 ΔE 0.066
Use #66DE8A 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.