#218A57
Closest named color: Sea Green (#2E8B57). oklch(56.3% 0.122 156.8), rgb(33, 138, 87).
Aa
Black text reads best on this color (4.83:1).
About this color
#218A57 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.122 and its hue 157°. 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 4.83:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #218A57 |
| RGB | rgb(33, 138, 87) |
| HSL | hsl(151, 61%, 34%) |
| OKLCH | oklch(56.3% 0.122 156.8) |
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 #218A57 | 4.34:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #218A57 | 4.83:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #218A57 text on white | 4.34:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #218A57 text on black | 4.83:1 | AA | Lc -32.0 | 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
#E2EDE6
oklch(93.6% 0.015 158.2)
-
Step 200
200
#CAE0D1
oklch(88.6% 0.031 155.9)
-
Step 300
300
#A4CCB2
oklch(80.9% 0.056 156.4)
-
Step 400
400
#71B18A
oklch(70.6% 0.088 156.6)
-
Step 500
500
#469E6D
oklch(63.2% 0.113 156.5)
-
Step 600
600 (this color)
#218A57
oklch(56.3% 0.122 156.8)
-
Step 700
700
#0B7345
oklch(49% 0.114 156.7)
-
Step 800
800
#115E39
oklch(42.7% 0.095 156.7)
-
Step 900
900
#194D31
oklch(37.7% 0.073 156.4)
-
Step 950
950
#102D1D
oklch(26.9% 0.046 157)
#218A57 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) | #897F54 | 0.111 |
| Deuteranopia (no green cones) | #7C765A | 0.107 |
| Tritanopia (no blue cones) | #00897D | 0.057 |
| Achromatopsia (no color) | #797979 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218A57
#218A57
oklch(56.3% 0.122 156.8)
- #A1578F
#A1578F
oklch(56.3% 0.121 336.9)
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 #218A57, 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 0.026
- Jungle Green #048243 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.042
- Fern Green #548D44 ΔE 0.044
- Dark Sage #598556 ΔE 0.045
- Kelley Green #009337 ΔE 0.055
- Forest Green #228B22 ΔE 0.058
Use #218A57 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.