#318A4E
Closest named color: Sea Green (#2E8B57). oklch(56.5% 0.125 151), rgb(49, 138, 78).
Aa
Black text reads best on this color (4.87:1).
About this color
#318A4E is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.125 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.011 away. Black text reads best on it, at 4.87:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #318A4E |
| RGB | rgb(49, 138, 78) |
| HSL | hsl(140, 48%, 37%) |
| OKLCH | oklch(56.5% 0.125 151) |
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 #318A4E | 4.30:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #318A4E | 4.87:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #318A4E text on white | 4.30:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #318A4E text on black | 4.87:1 | AA | Lc -32.2 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CBDFCF
oklch(88.4% 0.03 151.5)
-
Step 300
300
#A7CBAE
oklch(80.8% 0.056 150.7)
-
Step 400
400
#76B184
oklch(70.7% 0.09 151)
-
Step 500
500
#4F9D65
oklch(63.1% 0.115 151.1)
-
Step 600
600 (this color)
#318A4E
oklch(56.5% 0.125 151)
-
Step 700
700
#1F733C
oklch(49.2% 0.117 150.7)
-
Step 800
800
#1D5D32
oklch(42.6% 0.096 150.9)
-
Step 900
900
#1F4D2C
oklch(37.8% 0.076 150.5)
-
Step 950
950
#132D1A
oklch(27% 0.048 150.8)
#318A4E 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) | #8B7F4A | 0.105 |
| Deuteranopia (no green cones) | #7F7752 | 0.102 |
| Tritanopia (no blue cones) | #11887B | 0.067 |
| Achromatopsia (no color) | #7A7A7A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #318A4E
#318A4E
oklch(56.5% 0.125 151)
- #9F5897
#9F5897
oklch(56.5% 0.125 331.3)
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 #318A4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.011
- Viridian #1E9167 ΔE 0.033
- Fern Green #548D44 ΔE 0.033
- Jungle Green #048243 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.035
- Dark Sage #598556 ΔE 0.042
- Kelley Green #009337 ΔE 0.047
- Forest Green #228B22 ΔE 0.049
Use #318A4E 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.