#37B40E
Closest named color: Leafy Green (#51B73B). oklch(67.5% 0.215 140.3), rgb(55, 180, 14).
Aa
Black text reads best on this color (7.69:1).
About this color
#37B40E is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.215 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.033 away. Black text reads best on it, at 7.69:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.215) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.69:1 |
| White text | 2.72:1 |
Values
| HEX | #37B40E |
| RGB | rgb(55, 180, 14) |
| HSL | hsl(105, 86%, 38%) |
| OKLCH | oklch(67.5% 0.215 140.3) |
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 #37B40E | 2.72:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #37B40E | 7.69:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #37B40E text on white | 2.72:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #37B40E text on black | 7.69:1 | AAA | Lc -49.6 | 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 400.
-
Step 50
50
#EFF9ED
oklch(97.1% 0.019 140.5)
-
Step 100
100
#DDF1D8
oklch(93.7% 0.039 139.4)
-
Step 200
200
#BFE6B8
oklch(88.5% 0.074 140.8)
-
Step 300
300
#90D682
oklch(80.9% 0.134 140.3)
-
Step 400
400 (this color)
#37B40E
oklch(67.5% 0.215 140.3)
-
Step 500
500
#2EA500
oklch(63.2% 0.205 140.3)
-
Step 600
600
#258B00
oklch(55.7% 0.181 140.4)
-
Step 700
700
#1E7500
oklch(49.2% 0.159 140.3)
-
Step 800
800
#176000
oklch(42.8% 0.139 140.3)
-
Step 900
900
#115000
oklch(37.7% 0.122 140.4)
-
Step 950
950
#073000
oklch(27% 0.088 140.4)
#37B40E 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) | #B9A200 | 0.147 |
| Deuteranopia (no green cones) | #AB992A | 0.144 |
| Tritanopia (no blue cones) | #1DAE99 | 0.144 |
| Achromatopsia (no color) | #9D9D9D | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B40E
#37B40E
oklch(67.5% 0.215 140.3)
- #CF60E6
#CF60E6
oklch(67.6% 0.214 320.5)
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 #37B40E, closest first.
No curated palette has a color within ΔE 0.04 of #37B40E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.033
- Frog Green #58BC08 ΔE 0.035
- Kelly Green #02AB2E ΔE 0.037
- Leaf Green #5CA904 ΔE 0.037
- Shamrock #01B44C ΔE 0.038
- Grass #5CAC2D ΔE 0.040
- Shamrock Green #02C14D ΔE 0.044
- Medium Green #39AD48 ΔE 0.046
Use #37B40E 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.