#37B240
Closest named color: Shamrock (#01B44C). oklch(67.3% 0.188 144.2), rgb(55, 178, 64).
Aa
Black text reads best on this color (7.60:1).
About this color
#37B240 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.188 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.015 away. Black text reads best on it, at 7.60:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.188) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.60:1 |
| White text | 2.76:1 |
Values
| HEX | #37B240 |
| RGB | rgb(55, 178, 64) |
| HSL | hsl(124, 53%, 46%) |
| OKLCH | oklch(67.3% 0.188 144.2) |
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 #37B240 | 2.76:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #37B240 | 7.60:1 | AAA | Lc 51.2 | Large or bold text, headings |
| #37B240 text on white | 2.76:1 | Fails | Lc 52.8 | Large or bold text, headings |
| #37B240 text on black | 7.60:1 | 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
#91D590
oklch(81% 0.118 144.1)
-
Step 400
400 (this color)
#37B240
oklch(67.3% 0.188 144.2)
-
Step 500
500
#00A623
oklch(63% 0.203 144.1)
-
Step 600
600
#008C1C
oklch(55.6% 0.179 144.1)
-
Step 700
700
#007616
oklch(49.1% 0.159 144.1)
-
Step 800
800
#006110
oklch(42.8% 0.138 144.1)
-
Step 900
900
#00510C
oklch(37.8% 0.122 144.2)
-
Step 950
950
#003004
oklch(26.8% 0.087 144)
#37B240 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) | #B5A232 | 0.137 |
| Deuteranopia (no green cones) | #A7984A | 0.138 |
| Tritanopia (no blue cones) | #0FAD9A | 0.117 |
| Achromatopsia (no color) | #9C9C9C | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B240
#37B240
oklch(67.3% 0.188 144.2)
- #CC67D6
#CC67D6
oklch(67.3% 0.187 323.9)
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 #37B240, closest first.
No curated palette has a color within ΔE 0.04 of #37B240.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.015
- Medium Green #39AD48 ΔE 0.018
- Leafy Green #51B73B ΔE 0.024
- Grass #5CAC2D ΔE 0.027
- Kelly Green #02AB2E ΔE 0.032
- Leaf Green #5CA904 ΔE 0.035
- Cool Green #33B864 ΔE 0.037
- Mid Green #50A747 ΔE 0.037
Use #37B240 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.