#338B40
Closest named color: Sea Green (#2E8B57). oklch(56.6% 0.139 146.1), rgb(51, 139, 64).
Aa
Black text reads best on this color (4.90:1).
About this color
#338B40 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.139 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.028 away. Black text reads best on it, at 4.90:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #338B40 |
| RGB | rgb(51, 139, 64) |
| HSL | hsl(129, 46%, 37%) |
| OKLCH | oklch(56.6% 0.139 146.1) |
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 #338B40 | 4.27:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #338B40 | 4.90:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #338B40 text on white | 4.27:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #338B40 text on black | 4.90:1 | AA | Lc -32.4 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E3EDE3
oklch(93.6% 0.017 145.4)
-
Step 200
200
#CBE0CC
oklch(88.6% 0.035 146.6)
-
Step 300
300
#A7CCA9
oklch(80.9% 0.063 146.4)
-
Step 400
400
#77B27B
oklch(70.8% 0.1 146)
-
Step 500
500
#509E58
oklch(63.2% 0.129 146)
-
Step 600
600 (this color)
#338B40
oklch(56.6% 0.139 146.1)
-
Step 700
700
#21732F
oklch(49.1% 0.129 146.1)
-
Step 800
800
#1E5E28
oklch(42.7% 0.107 146.2)
-
Step 900
900
#1F4D25
oklch(37.7% 0.083 146.3)
-
Step 950
950
#132D16
oklch(26.9% 0.053 146.4)
#338B40 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) | #8D7F39 | 0.107 |
| Deuteranopia (no green cones) | #827745 | 0.107 |
| Tritanopia (no blue cones) | #1D887A | 0.083 |
| Achromatopsia (no color) | #7A7A7A | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338B40
#338B40
oklch(56.6% 0.139 146.1)
- #9F55A1
#9F55A1
oklch(56.5% 0.139 326.3)
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 #338B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.028
- Fern Green #548D44 ΔE 0.031
- Forest Green #228B22 ΔE 0.032
- Kelley Green #009337 ΔE 0.033
- Jungle Green #048243 ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.039
- Emerald Green #028F1E ΔE 0.043
- Sap Green #5C8B15 ΔE 0.044
Use #338B40 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.