#288A4B
Closest named color: Sea Green (#2E8B57). oklch(56.2% 0.131 151.2), rgb(40, 138, 75).
Aa
Black text reads best on this color (4.82:1).
About this color
#288A4B is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.131 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.017 away. Black text reads best on it, at 4.82:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #288A4B |
| RGB | rgb(40, 138, 75) |
| HSL | hsl(141, 55%, 35%) |
| OKLCH | oklch(56.2% 0.131 151.2) |
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 #288A4B | 4.35:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #288A4B | 4.82:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #288A4B text on white | 4.35:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #288A4B text on black | 4.82:1 | AA | Lc -31.9 | 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
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CAE0CE
oklch(88.5% 0.034 150.8)
-
Step 300
300
#A5CCAE
oklch(80.9% 0.059 151.9)
-
Step 400
400
#73B282
oklch(70.8% 0.096 150.9)
-
Step 500
500
#4A9E63
oklch(63.1% 0.121 151.2)
-
Step 600
600 (this color)
#288A4B
oklch(56.2% 0.131 151.2)
-
Step 700
700
#16733B
oklch(49% 0.121 151.4)
-
Step 800
800
#175E31
oklch(42.7% 0.101 151.3)
-
Step 900
900
#1B4D2B
oklch(37.6% 0.079 151.2)
-
Step 950
950
#122D1A
oklch(27% 0.049 151.5)
#288A4B 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) | #8B7E46 | 0.111 |
| Deuteranopia (no green cones) | #7F764F | 0.109 |
| Tritanopia (no blue cones) | #00887B | 0.071 |
| Achromatopsia (no color) | #797979 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288A4B
#288A4B
oklch(56.2% 0.131 151.2)
- #A05598
#A05598
oklch(56.2% 0.132 331.2)
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 #288A4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.017
- Jungle Green #048243 ΔE 0.030
- Viridian #1E9167 ΔE 0.037
- Fern Green #548D44 ΔE 0.038
- Light Forest Green #4F9153 ΔE 0.041
- Kelley Green #009337 ΔE 0.042
- Forest Green #228B22 ΔE 0.043
- Dark Sage #598556 ΔE 0.049
Use #288A4B 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.