#218D57
Closest named color: Sea Green (#2E8B57). oklch(57.1% 0.126 156), rgb(33, 141, 87).
Aa
Black text reads best on this color (5.01:1).
About this color
#218D57 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.126 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.008 away. Black text reads best on it, at 5.01:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #218D57 |
| RGB | rgb(33, 141, 87) |
| HSL | hsl(150, 62%, 34%) |
| OKLCH | oklch(57.1% 0.126 156) |
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 #218D57 | 4.18:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #218D57 | 5.01:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #218D57 text on white | 4.18:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #218D57 text on black | 5.01:1 | AA | Lc -33.2 | 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
#E2EDE5
oklch(93.6% 0.016 154.5)
-
Step 200
200
#C9E0D1
oklch(88.5% 0.032 157.1)
-
Step 300
300
#A4CCB1
oklch(80.9% 0.057 155.4)
-
Step 400
400
#70B289
oklch(70.8% 0.091 156)
-
Step 500
500
#449E6B
oklch(63.1% 0.116 155.9)
-
Step 600
600 (this color)
#218D57
oklch(57.1% 0.126 156)
-
Step 700
700
#047443
oklch(49.2% 0.118 155.9)
-
Step 800
800
#0E5E38
oklch(42.6% 0.097 156.4)
-
Step 900
900
#174D30
oklch(37.6% 0.076 156.1)
-
Step 950
950
#102D1C
oklch(26.9% 0.048 155.6)
#218D57 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) | #8C8153 | 0.113 |
| Deuteranopia (no green cones) | #7F785B | 0.111 |
| Tritanopia (no blue cones) | #008C7F | 0.059 |
| Achromatopsia (no color) | #7C7C7C | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218D57
#218D57
oklch(57.1% 0.126 156)
- #A55894
#A55894
oklch(57.1% 0.127 336)
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 #218D57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.008
- Viridian #1E9167 ΔE 0.022
- Light Forest Green #4F9153 ΔE 0.036
- Fern Green #548D44 ΔE 0.040
- Jungle Green #048243 ΔE 0.041
- Dark Sage #598556 ΔE 0.047
- Kelley Green #009337 ΔE 0.049
- Ocean Green #3D9973 ΔE 0.053
Use #218D57 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.