#66C66A
Closest named color: Soft Green (#6FC276). oklch(74.6% 0.158 144.6), rgb(102, 198, 106).
Aa
Black text reads best on this color (9.85:1).
About this color
#66C66A is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.158 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.023 away. Black text reads best on it, at 9.85:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 9.85:1 |
| White text | 2.13:1 |
Values
| HEX | #66C66A |
| RGB | rgb(102, 198, 106) |
| HSL | hsl(122, 46%, 59%) |
| OKLCH | oklch(74.6% 0.158 144.6) |
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 #66C66A | 2.13:1 | Fails | Lc -46.2 | Large or bold text, headings |
| Black text on #66C66A | 9.85:1 | AAA | Lc 62.4 | Content text, not long reading |
| #66C66A text on white | 2.13:1 | Fails | Lc 41.6 | Non-text elements, placeholder text |
| #66C66A text on black | 9.85:1 | AAA | Lc -60.7 | 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 400.
-
Step 50
50
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C4E3C3
oklch(88.5% 0.054 144.3)
-
Step 300
300
#99D299
oklch(81% 0.099 144.6)
-
Step 400
400 (this color)
#66C66A
oklch(74.6% 0.158 144.6)
-
Step 500
500
#00A628
oklch(63% 0.201 144.6)
-
Step 600
600
#008C21
oklch(55.6% 0.177 144.7)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#023007
oklch(27% 0.083 144.6)
#66C66A 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) | #C9B763 | 0.119 |
| Deuteranopia (no green cones) | #BCAE70 | 0.119 |
| Tritanopia (no blue cones) | #58C2B0 | 0.096 |
| Achromatopsia (no color) | #B2B2B2 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66C66A
#66C66A
oklch(74.6% 0.158 144.6)
- #DD87E4
#DD87E4
oklch(74.5% 0.158 324.3)
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 #66C66A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.023
- Dark Mint #48C072 ΔE 0.032
- Turtle Green #75B84F ΔE 0.040
- Algae Green #21C36F ΔE 0.041
- Seaweed #18D17B ΔE 0.042
- Dark Mint Green #20C073 ΔE 0.046
- Apple #6ECB3C ΔE 0.048
- Greenblue #23C48B ΔE 0.052
Use #66C66A 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.