#288A5D
Closest named color: Sea Green (#2E8B57). oklch(56.6% 0.114 159), rgb(40, 138, 93).
Aa
Black text reads best on this color (4.88:1).
About this color
#288A5D is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.114 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.010 away. Black text reads best on it, at 4.88:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.88:1 |
| White text | 4.30:1 |
Values
| HEX | #288A5D |
| RGB | rgb(40, 138, 93) |
| HSL | hsl(152, 55%, 35%) |
| OKLCH | oklch(56.6% 0.114 159) |
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 #288A5D | 4.30:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #288A5D | 4.88:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #288A5D text on white | 4.30:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #288A5D text on black | 4.88:1 | AA | Lc -32.3 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE6
oklch(93.6% 0.015 158.2)
-
Step 200
200
#CADFD2
oklch(88.4% 0.029 158.6)
-
Step 300
300
#A5CBB5
oklch(80.8% 0.051 159.6)
-
Step 400
400
#73B18E
oklch(70.8% 0.082 158.7)
-
Step 500
500
#499D72
oklch(63.2% 0.105 158.9)
-
Step 600
600 (this color)
#288A5D
oklch(56.6% 0.114 159)
-
Step 700
700
#14724A
oklch(49% 0.105 159.1)
-
Step 800
800
#165D3D
oklch(42.6% 0.087 159.1)
-
Step 900
900
#1B4C34
oklch(37.6% 0.068 159.1)
-
Step 950
950
#112D1F
oklch(27% 0.043 159.7)
#288A5D 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) | #897F5A | 0.107 |
| Deuteranopia (no green cones) | #7C7660 | 0.104 |
| Tritanopia (no blue cones) | #00897E | 0.050 |
| Achromatopsia (no color) | #7A7A7A | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288A5D
#288A5D
oklch(56.6% 0.114 159)
- #A15A8C
#A15A8C
oklch(56.6% 0.113 339.1)
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 #288A5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.010
- Viridian #1E9167 ΔE 0.021
- Dark Sage #598556 ΔE 0.040
- Light Forest Green #4F9153 ΔE 0.041
- Jungle Green #048243 ΔE 0.043
- Fern Green #548D44 ΔE 0.046
- Ocean Green #3D9973 ΔE 0.053
- Kelley Green #009337 ΔE 0.063
Use #288A5D 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.