#66D87E
Closest named color: Aqua Green (#12E193). oklch(79.4% 0.164 148.5), rgb(102, 216, 126).
Aa
Black text reads best on this color (11.68:1).
About this color
#66D87E is a light, vivid green. In OKLCH its lightness is 79%, its chroma 0.164 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Green (#12E193), ΔE 0.038 away. Black text reads best on it, at 11.68:1.
| Hue family | Greens |
| Lightness | light (79%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Aqua Green (#12E193) |
| Black text | 11.68:1 |
| White text | 1.79:1 |
Values
| HEX | #66D87E |
| RGB | rgb(102, 216, 126) |
| HSL | hsl(133, 59%, 62%) |
| OKLCH | oklch(79.4% 0.164 148.5) |
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 #66D87E | 1.79:1 | Fails | Lc -37.0 | Non-text elements, placeholder text |
| Black text on #66D87E | 11.68:1 | AAA | Lc 70.8 | Content text, not long reading |
| #66D87E text on white | 1.79:1 | Fails | Lc 33.0 | Non-text elements, placeholder text |
| #66D87E text on black | 11.68:1 | AAA | Lc -69.6 | 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
#ECFAED
oklch(97.1% 0.023 147.5)
-
Step 100
100
#D5F3D9
oklch(93.5% 0.047 149)
-
Step 200
200
#B0EAB8
oklch(88.4% 0.09 148.5)
-
Step 300
300 (this color)
#66D87E
oklch(79.4% 0.164 148.5)
-
Step 400
400
#00C150
oklch(70.8% 0.203 148.4)
-
Step 500
500
#00A544
oklch(63% 0.18 148.5)
-
Step 600
600
#008B38
oklch(55.6% 0.159 148.5)
-
Step 700
700
#00752E
oklch(49.1% 0.14 148.5)
-
Step 800
800
#006024
oklch(42.7% 0.122 148.4)
-
Step 900
900
#00501D
oklch(37.6% 0.108 148.5)
-
Step 950
950
#00300E
oklch(27% 0.077 148.3)
#66D87E 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) | #DAC877 | 0.133 |
| Deuteranopia (no green cones) | #CABD84 | 0.131 |
| Tritanopia (no blue cones) | #4ED4C2 | 0.094 |
| Achromatopsia (no color) | #C1C1C1 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66D87E
#66D87E
oklch(79.4% 0.164 148.5)
- #F493F0
#F493F0
oklch(79.4% 0.164 328.5)
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 #66D87E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Green #12E193 ΔE 0.038
- Weird Green #3AE57F ΔE 0.040
- Seaweed #18D17B ΔE 0.045
- Fresh Green #69D84F ΔE 0.048
- Emerald #06D6A0 ΔE 0.054
- Soft Green #6FC276 ΔE 0.060
- Apple #6ECB3C ΔE 0.062
- Yellow Green #9ACD32 ΔE 0.069
Use #66D87E 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.