#66D07A
Closest named color: Seaweed (#18D17B). oklch(77.3% 0.156 148), rgb(102, 208, 122).
Aa
Black text reads best on this color (10.86:1).
About this color
#66D07A is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.156 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.037 away. Black text reads best on it, at 10.86:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.86:1 |
| White text | 1.93:1 |
Values
| HEX | #66D07A |
| RGB | rgb(102, 208, 122) |
| HSL | hsl(131, 53%, 61%) |
| OKLCH | oklch(77.3% 0.156 148) |
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 #66D07A | 1.93:1 | Fails | Lc -41.1 | Non-text elements, placeholder text |
| Black text on #66D07A | 10.86:1 | AAA | Lc 67.1 | Content text, not long reading |
| #66D07A text on white | 1.93:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #66D07A text on black | 10.86:1 | AAA | Lc -65.7 | 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
#EDFAEE
oklch(97.2% 0.021 147.6)
-
Step 100
100
#D6F3D9
oklch(93.6% 0.046 148.1)
-
Step 200
200
#B2EAB9
oklch(88.6% 0.088 148.1)
-
Step 300
300 (this color)
#66D07A
oklch(77.3% 0.156 148)
-
Step 400
400
#00C14E
oklch(70.7% 0.204 148.1)
-
Step 500
500
#00A542
oklch(63% 0.182 148.1)
-
Step 600
600
#008B36
oklch(55.5% 0.161 148.1)
-
Step 700
700
#00752C
oklch(49% 0.142 148)
-
Step 800
800
#006023
oklch(42.7% 0.123 148.1)
-
Step 900
900
#00501C
oklch(37.6% 0.109 148.1)
-
Step 950
950
#00300E
oklch(27% 0.077 148.3)
#66D07A 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) | #D2C174 | 0.126 |
| Deuteranopia (no green cones) | #C3B680 | 0.125 |
| Tritanopia (no blue cones) | #52CCBB | 0.091 |
| Achromatopsia (no color) | #BABABA | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66D07A
#66D07A
oklch(77.3% 0.156 148)
- #EA8FE7
#EA8FE7
oklch(77.3% 0.156 328.1)
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 #66D07A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.037
- Soft Green #6FC276 ΔE 0.038
- Aqua Green #12E193 ΔE 0.051
- Emerald #06D6A0 ΔE 0.051
- Dark Mint #48C072 ΔE 0.053
- Fresh Green #69D84F ΔE 0.055
- Apple #6ECB3C ΔE 0.056
- Algae Green #21C36F ΔE 0.059
Use #66D07A 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.