#57A751
Closest named color: Fern (#63A950). oklch(65.7% 0.145 142.4), rgb(87, 167, 81).
Aa
Black text reads best on this color (7.05:1).
About this color
#57A751 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.145 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern (#63A950), ΔE 0.013 away. Black text reads best on it, at 7.05:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Fern (#63A950) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #57A751 |
| RGB | rgb(87, 167, 81) |
| HSL | hsl(116, 35%, 49%) |
| OKLCH | oklch(65.7% 0.145 142.4) |
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 #57A751 | 2.97:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #57A751 | 7.05:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #57A751 text on white | 2.97:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #57A751 text on black | 7.05:1 | AAA | Lc -45.6 | 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 500.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#CBE0C8
oklch(88.4% 0.039 141.7)
-
Step 300
300
#A7CDA3
oklch(81% 0.071 142.4)
-
Step 400
400
#76B370
oklch(70.8% 0.114 142.2)
-
Step 500
500 (this color)
#57A751
oklch(65.7% 0.145 142.4)
-
Step 600
600
#2E8929
oklch(55.6% 0.158 142.4)
-
Step 700
700
#1F741B
oklch(49.1% 0.147 142.4)
-
Step 800
800
#1D5F19
oklch(42.8% 0.122 142.3)
-
Step 900
900
#1F4E1C
oklch(37.8% 0.094 142.4)
-
Step 950
950
#132E11
oklch(27.1% 0.061 142.4)
#57A751 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) | #AA9A4A | 0.104 |
| Deuteranopia (no green cones) | #9F9357 | 0.103 |
| Tritanopia (no blue cones) | #4EA393 | 0.092 |
| Achromatopsia (no color) | #959595 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57A751
#57A751
oklch(65.7% 0.145 142.4)
- #BA70C5
#BA70C5
oklch(65.6% 0.146 322.2)
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 #57A751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern #63A950 ΔE 0.013
- Mid Green #50A747 ΔE 0.013
- Dark Pastel Green #56AE57 ΔE 0.019
- Muted Green #5FA052 ΔE 0.021
- Off Green #6BA353 ΔE 0.023
- Algae #54AC68 ΔE 0.026
- Flat Green #699D4C ΔE 0.031
- Medium Green #39AD48 ΔE 0.031
Use #57A751 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.