#37B243
Closest named color: Shamrock (#01B44C). oklch(67.3% 0.186 144.6), rgb(55, 178, 67).
Aa
Black text reads best on this color (7.61:1).
About this color
#37B243 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.186 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.014 away. Black text reads best on it, at 7.61:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #37B243 |
| RGB | rgb(55, 178, 67) |
| HSL | hsl(126, 53%, 46%) |
| OKLCH | oklch(67.3% 0.186 144.6) |
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 #37B243 | 2.75:1 | Fails | Lc -58.0 | Large or bold text, headings |
| Black text on #37B243 | 7.61:1 | AAA | Lc 51.2 | Large or bold text, headings |
| #37B243 text on white | 2.75:1 | Fails | Lc 52.8 | Large or bold text, headings |
| #37B243 text on black | 7.61:1 | 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
#EFF8EF
oklch(97% 0.015 145.5)
-
Step 100
100
#DDF0DC
oklch(93.6% 0.033 143.9)
-
Step 200
200
#C0E5BF
oklch(88.5% 0.064 144.3)
-
Step 300
300
#91D591
oklch(81% 0.117 144.4)
-
Step 400
400 (this color)
#37B243
oklch(67.3% 0.186 144.6)
-
Step 500
500
#00A628
oklch(63% 0.201 144.6)
-
Step 600
600
#008C20
oklch(55.6% 0.177 144.6)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#003006
oklch(26.9% 0.085 144.8)
#37B243 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) | #B5A236 | 0.137 |
| Deuteranopia (no green cones) | #A7984C | 0.137 |
| Tritanopia (no blue cones) | #0CAD9A | 0.115 |
| Achromatopsia (no color) | #9C9C9C | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B243
#37B243
oklch(67.3% 0.186 144.6)
- #CC67D4
#CC67D4
oklch(67.2% 0.185 324.6)
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 #37B243, closest first.
No curated palette has a color within ΔE 0.04 of #37B243.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.014
- Medium Green #39AD48 ΔE 0.017
- Leafy Green #51B73B ΔE 0.025
- Grass #5CAC2D ΔE 0.027
- Kelly Green #02AB2E ΔE 0.033
- Cool Green #33B864 ΔE 0.034
- Mid Green #50A747 ΔE 0.035
- Dark Pastel Green #56AE57 ΔE 0.036
Use #37B243 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.