#31BB57
Closest named color: Cool Green (#33B864). oklch(69.8% 0.182 148.1), rgb(49, 187, 87).
Aa
Black text reads best on this color (8.37:1).
About this color
#31BB57 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.182 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.019 away. Black text reads best on it, at 8.37:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.37:1 |
| White text | 2.50:1 |
Values
| HEX | #31BB57 |
| RGB | rgb(49, 187, 87) |
| HSL | hsl(137, 58%, 46%) |
| OKLCH | oklch(69.8% 0.182 148.1) |
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 #31BB57 | 2.50:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #31BB57 | 8.37:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #31BB57 text on white | 2.50:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #31BB57 text on black | 8.37:1 | AAA | Lc -53.3 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DE
oklch(93.5% 0.032 148.2)
-
Step 200
200
#BEE5C2
oklch(88.5% 0.063 147.8)
-
Step 300
300
#8CD597
oklch(80.9% 0.114 148.2)
-
Step 400
400 (this color)
#31BB57
oklch(69.8% 0.182 148.1)
-
Step 500
500
#00A542
oklch(63% 0.182 148.1)
-
Step 600
600
#008B36
oklch(55.5% 0.161 148.1)
-
Step 700
700
#00752D
oklch(49.1% 0.141 148.2)
-
Step 800
800
#006023
oklch(42.7% 0.123 148.1)
-
Step 900
900
#00501C
oklch(37.6% 0.109 148.1)
-
Step 950
950
#00300E
oklch(27% 0.077 148.3)
#31BB57 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) | #BDAA4E | 0.145 |
| Deuteranopia (no green cones) | #AD9F5F | 0.144 |
| Tritanopia (no blue cones) | #00B7A4 | 0.105 |
| Achromatopsia (no color) | #A4A4A4 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31BB57
#31BB57
oklch(69.8% 0.182 148.1)
- #D86FD6
#D86FD6
oklch(69.8% 0.182 328)
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 #31BB57, closest first.
No curated palette has a color within ΔE 0.04 of #31BB57.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.019
- Shamrock Green #02C14D ΔE 0.025
- Leafy Green #51B73B ΔE 0.026
- Shamrock #01B44C ΔE 0.027
- Algae Green #21C36F ΔE 0.029
- Dark Mint Green #20C073 ΔE 0.031
- Dark Mint #48C072 ΔE 0.037
- Medium Green #39AD48 ΔE 0.039
Use #31BB57 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.