#218F58
Closest named color: Sea Green (#2E8B57). oklch(57.6% 0.128 156), rgb(33, 143, 88).
Aa
Black text reads best on this color (5.13:1).
About this color
#218F58 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.128 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 0.013 away. Black text reads best on it, at 5.13:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #218F58 |
| RGB | rgb(33, 143, 88) |
| HSL | hsl(150, 63%, 35%) |
| OKLCH | oklch(57.6% 0.128 156) |
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 #218F58 | 4.08:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #218F58 | 5.13:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #218F58 text on white | 4.08:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #218F58 text on black | 5.13:1 | AA | Lc -34.0 | 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
#E1EDE5
oklch(93.5% 0.017 156.9)
-
Step 200
200
#C9E0D0
oklch(88.5% 0.033 155.3)
-
Step 300
300
#A3CCB1
oklch(80.8% 0.058 156)
-
Step 400
400
#6FB288
oklch(70.7% 0.092 155.7)
-
Step 500
500
#429E6B
oklch(63% 0.117 156.3)
-
Step 600
600 (this color)
#218F58
oklch(57.6% 0.128 156)
-
Step 700
700
#007443
oklch(49.1% 0.119 156.1)
-
Step 800
800
#0B5E37
oklch(42.6% 0.098 156.1)
-
Step 900
900
#164D30
oklch(37.6% 0.076 156.4)
-
Step 950
950
#0F2D1C
oklch(26.9% 0.048 156.1)
#218F58 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) | #8E8354 | 0.115 |
| Deuteranopia (no green cones) | #817A5C | 0.112 |
| Tritanopia (no blue cones) | #008E81 | 0.061 |
| Achromatopsia (no color) | #7D7D7D | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218F58
#218F58
oklch(57.6% 0.128 156)
- #A75996
#A75996
oklch(57.6% 0.128 335.9)
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 #218F58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.013
- Viridian #1E9167 ΔE 0.020
- Light Forest Green #4F9153 ΔE 0.033
- Fern Green #548D44 ΔE 0.038
- Jungle Green #048243 ΔE 0.046
- Kelley Green #009337 ΔE 0.046
- Ocean Green #3D9973 ΔE 0.049
- Dark Sage #598556 ΔE 0.049
Use #218F58 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.