#37B040
Closest named color: Medium Green (#39AD48). oklch(66.7% 0.185 144.2), rgb(55, 176, 64).
Aa
Black text reads best on this color (7.44:1).
About this color
#37B040 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.185 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.013 away. Black text reads best on it, at 7.44:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 7.44:1 |
| White text | 2.82:1 |
Values
| HEX | #37B040 |
| RGB | rgb(55, 176, 64) |
| HSL | hsl(124, 52%, 45%) |
| OKLCH | oklch(66.7% 0.185 144.2) |
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 #37B040 | 2.82:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #37B040 | 7.44:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #37B040 text on white | 2.82:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #37B040 text on black | 7.44:1 | AAA | Lc -48.1 | 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 500.
-
Step 50
50
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDF
oklch(93.7% 0.027 143.6)
-
Step 200
200
#C6E2C5
oklch(88.4% 0.049 144.2)
-
Step 300
300
#9DD09C
oklch(80.8% 0.09 144.2)
-
Step 400
400
#62B864
oklch(70.8% 0.145 144.3)
-
Step 500
500 (this color)
#37B040
oklch(66.7% 0.185 144.2)
-
Step 600
600
#008C1D
oklch(55.6% 0.179 144.2)
-
Step 700
700
#007617
oklch(49.1% 0.158 144.3)
-
Step 800
800
#006111
oklch(42.8% 0.138 144.2)
-
Step 900
900
#01510D
oklch(37.8% 0.121 144.2)
-
Step 950
950
#072F0A
oklch(26.8% 0.076 144.2)
#37B040 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) | #B3A033 | 0.136 |
| Deuteranopia (no green cones) | #A5964A | 0.137 |
| Tritanopia (no blue cones) | #11AB98 | 0.115 |
| Achromatopsia (no color) | #9A9A9A | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B040
#37B040
oklch(66.7% 0.185 144.2)
- #CA66D3
#CA66D3
oklch(66.7% 0.185 324.2)
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 #37B040, closest first.
No curated palette has a color within ΔE 0.04 of #37B040.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.013
- Shamrock #01B44C ΔE 0.016
- Grass #5CAC2D ΔE 0.026
- Kelly Green #02AB2E ΔE 0.029
- Leafy Green #51B73B ΔE 0.029
- Mid Green #50A747 ΔE 0.032
- Leaf Green #5CA904 ΔE 0.034
- Dark Pastel Green #56AE57 ΔE 0.037
Use #37B040 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.