#288F59
Closest named color: Sea Green (#2E8B57). oklch(57.8% 0.125 155.7), rgb(40, 143, 89).
Aa
Black text reads best on this color (5.16:1).
About this color
#288F59 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.125 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 0.012 away. Black text reads best on it, at 5.16:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #288F59 |
| RGB | rgb(40, 143, 89) |
| HSL | hsl(149, 56%, 36%) |
| OKLCH | oklch(57.8% 0.125 155.7) |
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 #288F59 | 4.06:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #288F59 | 5.16:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #288F59 text on white | 4.06:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #288F59 text on black | 5.16:1 | AA | Lc -34.2 | 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
#CAE0D0
oklch(88.6% 0.032 154.1)
-
Step 300
300
#A4CCB1
oklch(80.9% 0.057 155.4)
-
Step 400
400
#71B289
oklch(70.8% 0.09 155.6)
-
Step 500
500
#469E6B
oklch(63.1% 0.115 155.5)
-
Step 600
600 (this color)
#288F59
oklch(57.8% 0.125 155.7)
-
Step 700
700
#0B7343
oklch(49% 0.116 155.8)
-
Step 800
800
#115E37
oklch(42.7% 0.097 155.4)
-
Step 900
900
#194D30
oklch(37.7% 0.075 155.6)
-
Step 950
950
#102D1C
oklch(26.9% 0.048 155.6)
#288F59 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) | #8E8355 | 0.112 |
| Deuteranopia (no green cones) | #827A5D | 0.111 |
| Tritanopia (no blue cones) | #008E81 | 0.059 |
| Achromatopsia (no color) | #7E7E7E | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288F59
#288F59
oklch(57.8% 0.125 155.7)
- #A65B96
#A65B96
oklch(57.8% 0.124 335.5)
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 #288F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.012
- Viridian #1E9167 ΔE 0.018
- Light Forest Green #4F9153 ΔE 0.030
- Fern Green #548D44 ΔE 0.036
- Dark Sage #598556 ΔE 0.046
- Ocean Green #3D9973 ΔE 0.046
- Jungle Green #048243 ΔE 0.048
- Kelley Green #009337 ΔE 0.049
Use #288F59 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.