#31CB80
Closest named color: Seaweed (#18D17B). oklch(74.7% 0.166 156.4), rgb(49, 203, 128).
Aa
Black text reads best on this color (9.98:1).
About this color
#31CB80 is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.166 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.021 away. Black text reads best on it, at 9.98:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.98:1 |
| White text | 2.10:1 |
Values
| HEX | #31CB80 |
| RGB | rgb(49, 203, 128) |
| HSL | hsl(151, 61%, 49%) |
| OKLCH | oklch(74.7% 0.166 156.4) |
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 #31CB80 | 2.10:1 | Fails | Lc -45.3 | Large or bold text, headings |
| Black text on #31CB80 | 9.98:1 | AAA | Lc 63.2 | Content text, not long reading |
| #31CB80 text on white | 2.10:1 | Fails | Lc 40.7 | Non-text elements, placeholder text |
| #31CB80 text on black | 9.98:1 | AAA | Lc -61.6 | 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
#EEF8F2
oklch(97% 0.013 159.9)
-
Step 100
100
#DBF0E2
oklch(93.6% 0.029 156.6)
-
Step 200
200
#BBE5CA
oklch(88.5% 0.057 156.8)
-
Step 300
300
#87D5A5
oklch(80.9% 0.103 156.2)
-
Step 400
400 (this color)
#31CB80
oklch(74.7% 0.166 156.4)
-
Step 500
500
#00A462
oklch(63.2% 0.152 156.5)
-
Step 600
600
#008A51
oklch(55.7% 0.135 156.2)
-
Step 700
700
#007444
oklch(49.2% 0.118 156.6)
-
Step 800
800
#005F36
oklch(42.7% 0.103 156.1)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#31CB80 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) | #CABB7B | 0.150 |
| Deuteranopia (no green cones) | #B7AD85 | 0.147 |
| Tritanopia (no blue cones) | #00C9B8 | 0.079 |
| Achromatopsia (no color) | #B3B3B3 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31CB80
#31CB80
oklch(74.7% 0.166 156.4)
- #ED80D4
#ED80D4
oklch(74.7% 0.167 336.4)
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 #31CB80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.021
- Greenblue #23C48B ΔE 0.029
- Algae Green #21C36F ΔE 0.029
- Dark Mint #48C072 ΔE 0.030
- Dark Mint Green #20C073 ΔE 0.034
- Soft Green #6FC276 ΔE 0.041
- Emerald #06D6A0 ΔE 0.043
- Green Blue #01C08D ΔE 0.043
Use #31CB80 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.