#37B43B
Closest named color: Shamrock (#01B44C). oklch(67.7% 0.194 143.5), rgb(55, 180, 59).
Aa
Black text reads best on this color (7.75:1).
About this color
#37B43B is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.194 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.018 away. Black text reads best on it, at 7.75:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.194) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #37B43B |
| RGB | rgb(55, 180, 59) |
| HSL | hsl(122, 53%, 46%) |
| OKLCH | oklch(67.7% 0.194 143.5) |
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 #37B43B | 2.70:1 | Fails | Lc -57.2 | Large or bold text, headings |
| Black text on #37B43B | 7.75:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #37B43B text on white | 2.70:1 | Fails | Lc 52.0 | Large or bold text, headings |
| #37B43B text on black | 7.75:1 | AAA | Lc -49.9 | 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
#EFF8EF
oklch(97% 0.015 145.5)
-
Step 100
100
#DDF0DB
oklch(93.5% 0.034 142.6)
-
Step 200
200
#BFE5BD
oklch(88.4% 0.067 143.7)
-
Step 300
300
#90D58D
oklch(80.9% 0.121 143.4)
-
Step 400
400 (this color)
#37B43B
oklch(67.7% 0.194 143.5)
-
Step 500
500
#00A71A
oklch(63.2% 0.208 143.5)
-
Step 600
600
#008C14
oklch(55.5% 0.183 143.5)
-
Step 700
700
#00760F
oklch(49.1% 0.162 143.5)
-
Step 800
800
#00610B
oklch(42.7% 0.141 143.5)
-
Step 900
900
#005107
oklch(37.7% 0.124 143.4)
-
Step 950
950
#003103
oklch(27.2% 0.089 143.6)
#37B43B 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) | #B8A32B | 0.141 |
| Deuteranopia (no green cones) | #A99946 | 0.141 |
| Tritanopia (no blue cones) | #10AF9B | 0.122 |
| Achromatopsia (no color) | #9D9D9D | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B43B
#37B43B
oklch(67.7% 0.194 143.5)
- #CF66DA
#CF66DA
oklch(67.7% 0.194 323.7)
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 #37B43B, closest first.
No curated palette has a color within ΔE 0.04 of #37B43B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.018
- Leafy Green #51B73B ΔE 0.020
- Medium Green #39AD48 ΔE 0.026
- Grass #5CAC2D ΔE 0.029
- Kelly Green #02AB2E ΔE 0.034
- Shamrock Green #02C14D ΔE 0.035
- Leaf Green #5CA904 ΔE 0.036
- Cool Green #33B864 ΔE 0.040
Use #37B43B 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.