#31904C
Closest named color: Sea Green (#2E8B57). oklch(58.1% 0.135 149.4), rgb(49, 144, 76).
Aa
Black text reads best on this color (5.22:1).
About this color
#31904C is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.135 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.024 away. Black text reads best on it, at 5.22:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #31904C |
| RGB | rgb(49, 144, 76) |
| HSL | hsl(137, 49%, 38%) |
| OKLCH | oklch(58.1% 0.135 149.4) |
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 #31904C | 4.01:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #31904C | 5.22:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #31904C text on white | 4.01:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #31904C text on black | 5.22:1 | AA | Lc -34.5 | 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
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CAE0CD
oklch(88.5% 0.035 149.3)
-
Step 300
300
#A6CCAC
oklch(80.9% 0.06 149.5)
-
Step 400
400
#74B280
oklch(70.8% 0.097 149.5)
-
Step 500
500
#4B9E5F
oklch(63.1% 0.124 149.5)
-
Step 600
600 (this color)
#31904C
oklch(58.1% 0.135 149.4)
-
Step 700
700
#187436
oklch(49.2% 0.127 149.3)
-
Step 800
800
#185E2D
oklch(42.6% 0.105 149.3)
-
Step 900
900
#1C4D29
oklch(37.6% 0.081 149.6)
-
Step 950
950
#122D18
oklch(26.9% 0.051 149.2)
#31904C 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) | #918447 | 0.111 |
| Deuteranopia (no green cones) | #857B51 | 0.110 |
| Tritanopia (no blue cones) | #0E8D80 | 0.077 |
| Achromatopsia (no color) | #7F7F7F | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31904C
#31904C
oklch(58.1% 0.135 149.4)
- #A65AA1
#A65AA1
oklch(58.2% 0.135 329.6)
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 #31904C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.024
- Light Forest Green #4F9153 ΔE 0.028
- Fern Green #548D44 ΔE 0.028
- Kelley Green #009337 ΔE 0.034
- Viridian #1E9167 ΔE 0.035
- Forest Green #228B22 ΔE 0.044
- Moss Green #658B38 ΔE 0.046
- Irish Green #019529 ΔE 0.048
Use #31904C 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.