#31B30B
Closest named color: Kelly Green (#02AB2E). oklch(67.1% 0.216 140.7), rgb(49, 179, 11).
Aa
Black text reads best on this color (7.58:1).
About this color
#31B30B is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.216 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelly Green (#02AB2E), ΔE 0.033 away. Black text reads best on it, at 7.58:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.216) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 7.58:1 |
| White text | 2.76:1 |
Values
| HEX | #31B30B |
| RGB | rgb(49, 179, 11) |
| HSL | hsl(106, 88%, 37%) |
| OKLCH | oklch(67.1% 0.216 140.7) |
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 #31B30B | 2.76:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #31B30B | 7.58:1 | AAA | Lc 51.2 | Large or bold text, headings |
| #31B30B text on white | 2.76:1 | Fails | Lc 52.8 | Large or bold text, headings |
| #31B30B text on black | 7.58:1 | AAA | Lc -49.0 | 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
#EFF9ED
oklch(97.1% 0.019 140.5)
-
Step 100
100
#DCF1D8
oklch(93.6% 0.04 140.7)
-
Step 200
200
#BFE6B8
oklch(88.5% 0.074 140.8)
-
Step 300
300
#8FD682
oklch(80.9% 0.135 140.6)
-
Step 400
400 (this color)
#31B30B
oklch(67.1% 0.216 140.7)
-
Step 500
500
#29A500
oklch(63% 0.206 140.7)
-
Step 600
600
#218B00
oklch(55.6% 0.182 140.7)
-
Step 700
700
#1A7500
oklch(49.1% 0.161 140.8)
-
Step 800
800
#146000
oklch(42.7% 0.14 140.7)
-
Step 900
900
#0F5000
oklch(37.7% 0.123 140.7)
-
Step 950
950
#063000
oklch(27% 0.088 140.7)
#31B30B 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) | #B8A100 | 0.149 |
| Deuteranopia (no green cones) | #A99829 | 0.145 |
| Tritanopia (no blue cones) | #0BAD98 | 0.144 |
| Achromatopsia (no color) | #9B9B9B | 0.217 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B30B
#31B30B
oklch(67.1% 0.216 140.7)
- #CE5DE4
#CE5DE4
oklch(67% 0.216 320.8)
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 #31B30B, closest first.
No curated palette has a color within ΔE 0.04 of #31B30B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.033
- Leafy Green #51B73B ΔE 0.037
- Leaf Green #5CA904 ΔE 0.037
- Shamrock #01B44C ΔE 0.038
- Frog Green #58BC08 ΔE 0.039
- Grass #5CAC2D ΔE 0.041
- Medium Green #39AD48 ΔE 0.045
- Shamrock Green #02C14D ΔE 0.046
Use #31B30B 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.