#218E53
Closest named color: Sea Green (#2E8B57). oklch(57.3% 0.132 154.2), rgb(33, 142, 83).
Aa
Black text reads best on this color (5.05:1).
About this color
#218E53 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.132 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.014 away. Black text reads best on it, at 5.05:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #218E53 |
| RGB | rgb(33, 142, 83) |
| HSL | hsl(148, 62%, 34%) |
| OKLCH | oklch(57.3% 0.132 154.2) |
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 #218E53 | 4.15:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #218E53 | 5.05:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #218E53 text on white | 4.15:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #218E53 text on black | 5.05:1 | AA | Lc -33.5 | 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
#C9E0CF
oklch(88.5% 0.034 153.6)
-
Step 300
300
#A4CCB0
oklch(80.9% 0.058 154.4)
-
Step 400
400
#6FB286
oklch(70.7% 0.094 154.5)
-
Step 500
500
#439F67
oklch(63.2% 0.122 154.1)
-
Step 600
600 (this color)
#218E53
oklch(57.3% 0.132 154.2)
-
Step 700
700
#03743F
oklch(49.1% 0.122 154.2)
-
Step 800
800
#0D5F34
oklch(42.8% 0.102 153.9)
-
Step 900
900
#174D2E
oklch(37.6% 0.078 154.6)
-
Step 950
950
#0F2D1B
oklch(26.8% 0.049 154.8)
#218E53 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) | #8E824F | 0.116 |
| Deuteranopia (no green cones) | #817957 | 0.113 |
| Tritanopia (no blue cones) | #008C7F | 0.066 |
| Achromatopsia (no color) | #7C7C7C | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218E53
#218E53
oklch(57.3% 0.132 154.2)
- #A65798
#A65798
oklch(57.3% 0.133 334.2)
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 #218E53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.014
- Viridian #1E9167 ΔE 0.026
- Light Forest Green #4F9153 ΔE 0.035
- Fern Green #548D44 ΔE 0.037
- Jungle Green #048243 ΔE 0.041
- Kelley Green #009337 ΔE 0.042
- Forest Green #228B22 ΔE 0.050
- Dark Sage #598556 ΔE 0.050
Use #218E53 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.