#37B437
Closest named color: Shamrock (#01B44C). oklch(67.7% 0.197 143), rgb(55, 180, 55).
Aa
Black text reads best on this color (7.74:1).
About this color
#37B437 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.197 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.021 away. Black text reads best on it, at 7.74:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.197) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.74:1 |
| White text | 2.71:1 |
Values
| HEX | #37B437 |
| RGB | rgb(55, 180, 55) |
| HSL | hsl(120, 53%, 46%) |
| OKLCH | oklch(67.7% 0.197 143) |
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 #37B437 | 2.71:1 | Fails | Lc -57.3 | Large or bold text, headings |
| Black text on #37B437 | 7.74:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #37B437 text on white | 2.71:1 | Fails | Lc 52.1 | Large or bold text, headings |
| #37B437 text on black | 7.74:1 | AAA | Lc -49.8 | 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
#EFF9EE
oklch(97.2% 0.018 142.8)
-
Step 100
100
#DDF0DB
oklch(93.5% 0.034 142.6)
-
Step 200
200
#BFE5BC
oklch(88.4% 0.068 143)
-
Step 300
300
#90D58C
oklch(80.9% 0.122 143.1)
-
Step 400
400 (this color)
#37B437
oklch(67.7% 0.197 143)
-
Step 500
500
#00A711
oklch(63.2% 0.211 143)
-
Step 600
600
#008C0C
oklch(55.5% 0.186 143)
-
Step 700
700
#007609
oklch(49.1% 0.164 143)
-
Step 800
800
#006106
oklch(42.7% 0.143 143.1)
-
Step 900
900
#005104
oklch(37.7% 0.126 143)
-
Step 950
950
#003101
oklch(27.1% 0.091 142.9)
#37B437 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) | #B8A325 | 0.141 |
| Deuteranopia (no green cones) | #A99943 | 0.141 |
| Tritanopia (no blue cones) | #12AF9B | 0.125 |
| Achromatopsia (no color) | #9D9D9D | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B437
#37B437
oklch(67.7% 0.197 143)
- #CF65DC
#CF65DC
oklch(67.7% 0.198 323.1)
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 #37B437, closest first.
No curated palette has a color within ΔE 0.04 of #37B437.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.021
- Leafy Green #51B73B ΔE 0.021
- Medium Green #39AD48 ΔE 0.028
- Grass #5CAC2D ΔE 0.030
- Kelly Green #02AB2E ΔE 0.034
- Leaf Green #5CA904 ΔE 0.035
- Shamrock Green #02C14D ΔE 0.036
- Frog Green #58BC08 ΔE 0.040
Use #37B437 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.