#318E4E
Closest named color: Sea Green (#2E8B57). oklch(57.6% 0.131 150.4), rgb(49, 142, 78).
Aa
Black text reads best on this color (5.10:1).
About this color
#318E4E is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.131 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.017 away. Black text reads best on it, at 5.10:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.10:1 |
| White text | 4.10:1 |
Values
| HEX | #318E4E |
| RGB | rgb(49, 142, 78) |
| HSL | hsl(139, 49%, 37%) |
| OKLCH | oklch(57.6% 0.131 150.4) |
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 #318E4E | 4.10:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #318E4E | 5.10:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #318E4E text on white | 4.10:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #318E4E text on black | 5.10:1 | AA | Lc -33.8 | 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 600.
-
Step 50
50
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CBE0CE
oklch(88.6% 0.033 149.5)
-
Step 300
300
#A6CCAD
oklch(80.9% 0.059 150.3)
-
Step 400
400
#74B182
oklch(70.6% 0.093 150.7)
-
Step 500
500
#4C9E62
oklch(63.2% 0.121 150.4)
-
Step 600
600 (this color)
#318E4E
oklch(57.6% 0.131 150.4)
-
Step 700
700
#1A733A
oklch(49.1% 0.121 150.6)
-
Step 800
800
#1A5E30
oklch(42.8% 0.101 150.3)
-
Step 900
900
#1D4D2B
oklch(37.7% 0.078 150.6)
-
Step 950
950
#122D19
oklch(26.9% 0.05 150.3)
#318E4E 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) | #8F8249 | 0.109 |
| Deuteranopia (no green cones) | #837A52 | 0.107 |
| Tritanopia (no blue cones) | #0D8C7E | 0.070 |
| Achromatopsia (no color) | #7D7D7D | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #318E4E
#318E4E
oklch(57.6% 0.131 150.4)
- #A35A9D
#A35A9D
oklch(57.6% 0.13 330.2)
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 #318E4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.017
- Fern Green #548D44 ΔE 0.028
- Light Forest Green #4F9153 ΔE 0.028
- Viridian #1E9167 ΔE 0.031
- Kelley Green #009337 ΔE 0.039
- Jungle Green #048243 ΔE 0.044
- Forest Green #228B22 ΔE 0.046
- Dark Sage #598556 ΔE 0.047
Use #318E4E 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.