#37B533
Closest named color: Leafy Green (#51B73B). oklch(67.9% 0.2 142.6), rgb(55, 181, 51).
Aa
Black text reads best on this color (7.81:1).
About this color
#37B533 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.200 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.021 away. Black text reads best on it, at 7.81:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.81:1 |
| White text | 2.68:1 |
Values
| HEX | #37B533 |
| RGB | rgb(55, 181, 51) |
| HSL | hsl(118, 56%, 45%) |
| OKLCH | oklch(67.9% 0.2 142.6) |
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 #37B533 | 2.68:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #37B533 | 7.81:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #37B533 text on white | 2.68:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #37B533 text on black | 7.81:1 | AAA | Lc -50.2 | 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
#EFF9EE
oklch(97.2% 0.018 142.8)
-
Step 100
100
#DDF1DA
oklch(93.7% 0.037 141.6)
-
Step 200
200
#BFE6BC
oklch(88.6% 0.07 143.1)
-
Step 300
300
#90D58A
oklch(80.8% 0.124 142.5)
-
Step 400
400 (this color)
#37B533
oklch(67.9% 0.2 142.6)
-
Step 500
500
#00A704
oklch(63.1% 0.214 142.6)
-
Step 600
600
#008C02
oklch(55.5% 0.188 142.6)
-
Step 700
700
#007602
oklch(49% 0.166 142.6)
-
Step 800
800
#006101
oklch(42.7% 0.145 142.6)
-
Step 900
900
#005101
oklch(37.7% 0.128 142.6)
-
Step 950
950
#003100
oklch(27.1% 0.092 142.5)
#37B533 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) | #B9A41D | 0.142 |
| Deuteranopia (no green cones) | #AA9A40 | 0.142 |
| Tritanopia (no blue cones) | #13B09B | 0.128 |
| Achromatopsia (no color) | #9E9E9E | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B533
#37B533
oklch(67.9% 0.2 142.6)
- #D065DF
#D065DF
oklch(68% 0.201 322.6)
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 #37B533, closest first.
No curated palette has a color within ΔE 0.04 of #37B533.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.021
- Shamrock #01B44C ΔE 0.024
- Grass #5CAC2D ΔE 0.032
- Medium Green #39AD48 ΔE 0.033
- Shamrock Green #02C14D ΔE 0.034
- Frog Green #58BC08 ΔE 0.036
- Kelly Green #02AB2E ΔE 0.036
- Leaf Green #5CA904 ΔE 0.037
Use #37B533 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.