#37A561
Closest named color: Seaweed Green (#35AD6B). oklch(64.3% 0.142 152.5), rgb(55, 165, 97).
Aa
Black text reads best on this color (6.71:1).
About this color
#37A561 is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.142 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed Green (#35AD6B), ΔE 0.023 away. Black text reads best on it, at 6.71:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Seaweed Green (#35AD6B) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #37A561 |
| RGB | rgb(55, 165, 97) |
| HSL | hsl(143, 50%, 43%) |
| OKLCH | oklch(64.3% 0.142 152.5) |
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 #37A561 | 3.12:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #37A561 | 6.71:1 | AA | Lc 46.1 | Large or bold text, headings |
| #37A561 text on white | 3.12:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #37A561 text on black | 6.71:1 | AA | Lc -43.8 | 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
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E0EEE3
oklch(93.6% 0.021 152.2)
-
Step 200
200
#C7E1CD
oklch(88.5% 0.039 152.4)
-
Step 300
300
#9FCEAB
oklch(80.9% 0.07 152.5)
-
Step 400
400
#67B57F
oklch(70.8% 0.111 152.6)
-
Step 500
500 (this color)
#37A561
oklch(64.3% 0.142 152.5)
-
Step 600
600
#008A47
oklch(55.5% 0.144 152.6)
-
Step 700
700
#00743B
oklch(49% 0.127 152.7)
-
Step 800
800
#00602F
oklch(42.8% 0.112 152.4)
-
Step 900
900
#094F28
oklch(37.7% 0.093 152.6)
-
Step 950
950
#0A2E18
oklch(26.9% 0.058 153)
#37A561 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) | #A5985C | 0.121 |
| Deuteranopia (no green cones) | #978E66 | 0.119 |
| Tritanopia (no blue cones) | #00A394 | 0.073 |
| Achromatopsia (no color) | #929292 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A561
#37A561
oklch(64.3% 0.142 152.5)
- #BE69B2
#BE69B2
oklch(64.2% 0.142 332.5)
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 #37A561, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed Green #35AD6B ΔE 0.023
- Jade #1FA774 ΔE 0.024
- Jade Green #2BAF6A ΔE 0.028
- Muted Green #5FA052 ΔE 0.031
- Algae #54AC68 ΔE 0.032
- Mid Green #50A747 ΔE 0.033
- Dark Seafoam Green #3EAF76 ΔE 0.036
- Bluey Green #2BB179 ΔE 0.039
Use #37A561 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.