#37900A
Closest named color: Emerald Green (#028F1E). oklch(57.7% 0.177 138.7), rgb(55, 144, 10).
Aa
Black text reads best on this color (5.15:1).
About this color
#37900A is a medium-dark, vivid green. In OKLCH its lightness is 58%, its chroma 0.177 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald Green (#028F1E), ΔE 0.021 away. Black text reads best on it, at 5.15:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Emerald Green (#028F1E) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #37900A |
| RGB | rgb(55, 144, 10) |
| HSL | hsl(100, 87%, 30%) |
| OKLCH | oklch(57.7% 0.177 138.7) |
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 #37900A | 4.07:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #37900A | 5.15:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #37900A text on white | 4.07:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #37900A text on black | 5.15:1 | AA | Lc -34.2 | 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 600.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CBE1C5
oklch(88.6% 0.044 139)
-
Step 300
300
#A7CD9C
oklch(80.8% 0.079 138.7)
-
Step 400
400
#76B364
oklch(70.6% 0.127 138.8)
-
Step 500
500
#50A034
oklch(63.2% 0.164 138.7)
-
Step 600
600 (this color)
#37900A
oklch(57.7% 0.177 138.7)
-
Step 700
700
#297400
oklch(49.2% 0.154 138.7)
-
Step 800
800
#205F00
oklch(42.8% 0.134 138.7)
-
Step 900
900
#1F4E0D
oklch(37.7% 0.107 138.8)
-
Step 950
950
#132E0B
oklch(27% 0.067 139.2)
#37900A 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) | #958200 | 0.117 |
| Deuteranopia (no green cones) | #8A7B20 | 0.116 |
| Tritanopia (no blue cones) | #2D8B7A | 0.122 |
| Achromatopsia (no color) | #7E7E7E | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37900A
#37900A
oklch(57.7% 0.177 138.7)
- #A44FBA
#A44FBA
oklch(57.6% 0.177 319)
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 #37900A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald Green #028F1E ΔE 0.021
- True Green #089404 ΔE 0.021
- Irish Green #019529 ΔE 0.022
- Forest Green #228B22 ΔE 0.024
- Kelley Green #009337 ΔE 0.028
- Grass Green #3F9B0B ΔE 0.034
- Sap Green #5C8B15 ΔE 0.037
- Grassy Green #419C03 ΔE 0.038
Use #37900A 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.