#66D06D
Closest named color: Seaweed (#18D17B). oklch(77.1% 0.169 145), rgb(102, 208, 109).
Aa
Black text reads best on this color (10.80:1).
About this color
#66D06D is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.169 and its hue 145°. 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 10.80:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.80:1 |
| White text | 1.94:1 |
Values
| HEX | #66D06D |
| RGB | rgb(102, 208, 109) |
| HSL | hsl(124, 53%, 61%) |
| OKLCH | oklch(77.1% 0.169 145) |
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 #66D06D | 1.94:1 | Fails | Lc -41.4 | Non-text elements, placeholder text |
| Black text on #66D06D | 10.80:1 | AAA | Lc 66.9 | Content text, not long reading |
| #66D06D text on white | 1.94:1 | Fails | Lc 37.0 | Non-text elements, placeholder text |
| #66D06D text on black | 10.80:1 | AAA | Lc -65.4 | 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
#EDFAEC
oklch(97.2% 0.023 143.4)
-
Step 100
100
#D7F3D6
oklch(93.6% 0.049 144.2)
-
Step 200
200
#B3EAB3
oklch(88.5% 0.094 144.7)
-
Step 300
300 (this color)
#66D06D
oklch(77.1% 0.169 145)
-
Step 400
400
#00C235
oklch(70.7% 0.223 145)
-
Step 500
500
#00A62C
oklch(63% 0.198 145)
-
Step 600
600
#008C24
oklch(55.6% 0.175 145)
-
Step 700
700
#00761D
oklch(49.2% 0.154 145)
-
Step 800
800
#006116
oklch(42.8% 0.135 145)
-
Step 900
900
#005111
oklch(37.8% 0.119 145.1)
-
Step 950
950
#003007
oklch(26.9% 0.084 145.2)
#66D06D 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) | #D3C065 | 0.128 |
| Deuteranopia (no green cones) | #C5B674 | 0.128 |
| Tritanopia (no blue cones) | #55CBB9 | 0.104 |
| Achromatopsia (no color) | #BABABA | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66D06D
#66D06D
oklch(77.1% 0.169 145)
- #E98CEF
#E98CEF
oklch(77.1% 0.168 324.9)
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 #66D06D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.037
- Apple #6ECB3C ΔE 0.042
- Fresh Green #69D84F ΔE 0.042
- Soft Green #6FC276 ΔE 0.044
- Apple Green #76CD26 ΔE 0.053
- Dark Mint #48C072 ΔE 0.055
- Aqua Green #12E193 ΔE 0.055
- Weird Green #3AE57F ΔE 0.056
Use #66D06D 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.