#66BF5B
Closest named color: Turtle Green (#75B84F). oklch(72.6% 0.162 141.6), rgb(102, 191, 91).
Aa
Black text reads best on this color (9.16:1).
About this color
#66BF5B is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.162 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.021 away. Black text reads best on it, at 9.16:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.16:1 |
| White text | 2.29:1 |
Values
| HEX | #66BF5B |
| RGB | rgb(102, 191, 91) |
| HSL | hsl(113, 44%, 55%) |
| OKLCH | oklch(72.6% 0.162 141.6) |
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 #66BF5B | 2.29:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #66BF5B | 9.16:1 | AAA | Lc 59.0 | Large or bold text, headings |
| #66BF5B text on white | 2.29:1 | Fails | Lc 44.9 | Non-text elements, placeholder text |
| #66BF5B text on black | 9.16:1 | AAA | Lc -57.2 | Large or bold text, headings |
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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#DFEFDD
oklch(93.5% 0.029 142.2)
-
Step 200
200
#C5E3C1
oklch(88.5% 0.056 141.9)
-
Step 300
300
#9CD194
oklch(80.8% 0.1 141.3)
-
Step 400
400 (this color)
#66BF5B
oklch(72.6% 0.162 141.6)
-
Step 500
500
#22A60B
oklch(63.2% 0.207 141.6)
-
Step 600
600
#168C00
oklch(55.7% 0.186 141.6)
-
Step 700
700
#117600
oklch(49.2% 0.164 141.6)
-
Step 800
800
#0C6000
oklch(42.6% 0.142 141.6)
-
Step 900
900
#085100
oklch(37.8% 0.126 141.6)
-
Step 950
950
#063003
oklch(27% 0.085 141.8)
#66BF5B 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) | #C3B052 | 0.115 |
| Deuteranopia (no green cones) | #B7A862 | 0.115 |
| Tritanopia (no blue cones) | #5CBAA8 | 0.105 |
| Achromatopsia (no color) | #ABABAB | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BF5B
#66BF5B
oklch(72.6% 0.162 141.6)
- #D481E3
#D481E3
oklch(72.6% 0.162 321.3)
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 #66BF5B, closest first.
No curated palette has a color within ΔE 0.04 of #66BF5B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.021
- Dark Mint #48C072 ΔE 0.029
- Soft Green #6FC276 ΔE 0.033
- Algae Green #21C36F ΔE 0.038
- Boring Green #63B365 ΔE 0.040
- Leafy Green #51B73B ΔE 0.042
- Dark Mint Green #20C073 ΔE 0.042
- Cool Green #33B864 ΔE 0.044
Use #66BF5B 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.