#337E21
Closest named color: Tree Green (#2A7E19). oklch(52.6% 0.147 140.2), rgb(51, 126, 33).
Aa
White text reads best on this color (5.06:1).
About this color
#337E21 is a medium-dark, vivid green. In OKLCH its lightness is 53%, its chroma 0.147 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tree Green (#2A7E19), ΔE 0.010 away. White text reads best on it, at 5.06:1.
| Hue family | Greens |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Tree Green (#2A7E19) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #337E21 |
| RGB | rgb(51, 126, 33) |
| HSL | hsl(108, 58%, 31%) |
| OKLCH | oklch(52.6% 0.147 140.2) |
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 #337E21 | 5.06:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #337E21 | 4.14:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #337E21 text on white | 5.06:1 | AA | Lc 74.6 | Content text, not long reading |
| #337E21 text on black | 4.14:1 | AA large text | Lc -27.1 | Dividers and decoration only |
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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E3EDE1
oklch(93.5% 0.019 140.5)
-
Step 200
200
#CDE0C9
oklch(88.6% 0.037 140.2)
-
Step 300
300
#AACCA3
oklch(80.9% 0.067 140.3)
-
Step 400
400
#7CB171
oklch(70.7% 0.106 140.2)
-
Step 500
500
#599D4B
oklch(63.1% 0.135 140.3)
-
Step 600
600 (this color)
#337E21
oklch(52.6% 0.147 140.2)
-
Step 700
700
#2E721D
oklch(49% 0.137 140.1)
-
Step 800
800
#275D1B
oklch(42.6% 0.113 140.3)
-
Step 900
900
#254D1C
oklch(37.8% 0.09 140.1)
-
Step 950
950
#162D12
oklch(27% 0.056 140.8)
#337E21 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) | #827212 | 0.100 |
| Deuteranopia (no green cones) | #786C2A | 0.100 |
| Tritanopia (no blue cones) | #2A7A6C | 0.099 |
| Achromatopsia (no color) | #6E6E6E | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337E21
#337E21
oklch(52.6% 0.147 140.2)
- #8F499E
#8F499E
oklch(52.6% 0.147 320.3)
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 #337E21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tree Green #2A7E19 ΔE 0.010
- Dark Grass Green #388004 ΔE 0.016
- Green #008000 ΔE 0.031
- Jungle Green #048243 ΔE 0.033
- Forest Green #228B22 ΔE 0.039
- Emerald Green #028F1E ΔE 0.053
- Olive Green #677A04 ΔE 0.055
- Kelley Green #009337 ΔE 0.060
Use #337E21 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.