#57B166
Closest named color: Boring Green (#63B365). oklch(68.6% 0.139 147.5), rgb(87, 177, 102).
Aa
Black text reads best on this color (7.88:1).
About this color
#57B166 is a medium-light, moderately saturated green. In OKLCH its lightness is 69%, its chroma 0.139 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.013 away. Black text reads best on it, at 7.88:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 7.88:1 |
| White text | 2.66:1 |
Values
| HEX | #57B166 |
| RGB | rgb(87, 177, 102) |
| HSL | hsl(130, 37%, 52%) |
| OKLCH | oklch(68.6% 0.139 147.5) |
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 #57B166 | 2.66:1 | Fails | Lc -56.7 | Large or bold text, headings |
| Black text on #57B166 | 7.88:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #57B166 text on white | 2.66:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #57B166 text on black | 7.88:1 | AAA | Lc -50.3 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#DFEFE0
oklch(93.6% 0.026 147.1)
-
Step 200
200
#C5E2C7
oklch(88.4% 0.048 147.1)
-
Step 300
300
#9BD0A1
oklch(80.8% 0.086 147.7)
-
Step 400
400 (this color)
#57B166
oklch(68.6% 0.139 147.5)
-
Step 500
500
#19A543
oklch(63.2% 0.178 147.5)
-
Step 600
600
#008B33
oklch(55.5% 0.163 147.4)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501A
oklch(37.6% 0.11 147.5)
-
Step 950
950
#04300F
oklch(27.1% 0.074 147.5)
#57B166 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) | #B3A461 | 0.111 |
| Deuteranopia (no green cones) | #A69B6B | 0.110 |
| Tritanopia (no blue cones) | #47AE9F | 0.081 |
| Achromatopsia (no color) | #9E9E9E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57B166
#57B166
oklch(68.6% 0.139 147.5)
- #C779C6
#C779C6
oklch(68.6% 0.139 327.4)
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 #57B166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.013
- Algae #54AC68 ΔE 0.016
- Dark Pastel Green #56AE57 ΔE 0.018
- Medium Sea Green #3CB371 ΔE 0.019
- Dark Seafoam Green #3EAF76 ΔE 0.027
- Fern #63A950 ΔE 0.027
- Seaweed Green #35AD6B ΔE 0.028
- Jade Green #2BAF6A ΔE 0.029
Use #57B166 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.