#37A537
Closest named color: Medium Green (#39AD48). oklch(63.7% 0.179 143.1), rgb(55, 165, 55).
Aa
Black text reads best on this color (6.59:1).
About this color
#37A537 is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.179 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.025 away. Black text reads best on it, at 6.59:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 6.59:1 |
| White text | 3.18:1 |
Values
| HEX | #37A537 |
| RGB | rgb(55, 165, 55) |
| HSL | hsl(120, 50%, 43%) |
| OKLCH | oklch(63.7% 0.179 143.1) |
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 #37A537 | 3.18:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #37A537 | 6.59:1 | AA | Lc 45.5 | Large or bold text, headings |
| #37A537 text on white | 3.18:1 | AA large text | Lc 58.5 | Large or bold text, headings |
| #37A537 text on black | 6.59:1 | AA | Lc -43.2 | Non-text elements, placeholder text |
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
#C7E2C5
oklch(88.5% 0.049 143.3)
-
Step 300
300
#9FD09C
oklch(80.9% 0.088 143.3)
-
Step 400
400
#68B664
oklch(70.6% 0.139 142.9)
-
Step 500
500 (this color)
#37A537
oklch(63.7% 0.179 143.1)
-
Step 600
600
#008C0E
oklch(55.5% 0.185 143.1)
-
Step 700
700
#00760A
oklch(49.1% 0.164 143.1)
-
Step 800
800
#006107
oklch(42.7% 0.142 143.1)
-
Step 900
900
#0C500E
oklch(37.7% 0.116 143.1)
-
Step 950
950
#0B2F0B
oklch(27% 0.073 143.2)
#37A537 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) | #A89629 | 0.128 |
| Deuteranopia (no green cones) | #9B8D41 | 0.128 |
| Tritanopia (no blue cones) | #1DA08E | 0.114 |
| Achromatopsia (no color) | #909090 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A537
#37A537
oklch(63.7% 0.179 143.1)
- #BD5FC9
#BD5FC9
oklch(63.7% 0.179 323)
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 #37A537, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.025
- Kelly Green #02AB2E ΔE 0.026
- Mid Green #50A747 ΔE 0.027
- Grassy Green #419C03 ΔE 0.031
- Grass Green #3F9B0B ΔE 0.032
- Leaf Green #5CA904 ΔE 0.037
- Grass #5CAC2D ΔE 0.038
- Shamrock #01B44C ΔE 0.041
Use #37A537 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.