#31AB18
Closest named color: Kelly Green (#02AB2E). oklch(64.9% 0.204 141), rgb(49, 171, 24).
Aa
Black text reads best on this color (6.96:1).
About this color
#31AB18 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.204 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 0.015 away. Black text reads best on it, at 6.96:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.204) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #31AB18 |
| RGB | rgb(49, 171, 24) |
| HSL | hsl(110, 75%, 38%) |
| OKLCH | oklch(64.9% 0.204 141) |
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 #31AB18 | 3.01:1 | AA large text | Lc -61.6 | Content text, not long reading |
| Black text on #31AB18 | 6.96:1 | AA | Lc 47.7 | Large or bold text, headings |
| #31AB18 text on white | 3.01:1 | AA large text | Lc 56.3 | Large or bold text, headings |
| #31AB18 text on black | 6.96:1 | AA | Lc -45.5 | 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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E0EFDD
oklch(93.6% 0.029 140.5)
-
Step 200
200
#C6E3C1
oklch(88.6% 0.055 141)
-
Step 300
300
#9DD194
oklch(80.9% 0.1 140.9)
-
Step 400
400
#62B855
oklch(70.6% 0.159 141.1)
-
Step 500
500 (this color)
#31AB18
oklch(64.9% 0.204 141)
-
Step 600
600
#1E8B00
oklch(55.5% 0.183 141)
-
Step 700
700
#177500
oklch(49% 0.162 141.1)
-
Step 800
800
#116000
oklch(42.6% 0.141 141.1)
-
Step 900
900
#0D5000
oklch(37.6% 0.124 141)
-
Step 950
950
#083002
oklch(27.1% 0.085 140.8)
#31AB18 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) | #B09A00 | 0.142 |
| Deuteranopia (no green cones) | #A2912D | 0.140 |
| Tritanopia (no blue cones) | #11A591 | 0.135 |
| Achromatopsia (no color) | #959595 | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31AB18
#31AB18
oklch(64.9% 0.204 141)
- #C55BD9
#C55BD9
oklch(65% 0.205 321)
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 #31AB18, closest first.
No curated palette has a color within ΔE 0.04 of #31AB18.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.015
- Leaf Green #5CA904 ΔE 0.029
- Medium Green #39AD48 ΔE 0.035
- Grass #5CAC2D ΔE 0.036
- Shamrock #01B44C ΔE 0.037
- Grassy Green #419C03 ΔE 0.042
- Grass Green #3F9B0B ΔE 0.045
- Mid Green #50A747 ΔE 0.047
Use #31AB18 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.