#288559
Closest named color: Sea Green (#2E8B57). oklch(55.1% 0.111 158.5), rgb(40, 133, 89).
Aa
Black text reads best on this color (4.58:1).
About this color
#288559 is a medium-dark, moderately saturated green. In OKLCH its lightness is 55%, its chroma 0.111 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.021 away. Black text reads best on it, at 4.58:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #288559 |
| RGB | rgb(40, 133, 89) |
| HSL | hsl(152, 54%, 34%) |
| OKLCH | oklch(55.1% 0.111 158.5) |
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 #288559 | 4.57:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #288559 | 4.58:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #288559 text on white | 4.57:1 | AA | Lc 71.4 | Content text, not long reading |
| #288559 text on black | 4.58:1 | AA | Lc -30.2 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE6
oklch(93.6% 0.015 158.2)
-
Step 200
200
#CBDFD2
oklch(88.5% 0.028 157.3)
-
Step 300
300
#A6CBB5
oklch(80.9% 0.05 159)
-
Step 400
400
#75B08E
oklch(70.7% 0.079 158.3)
-
Step 500
500
#4D9C72
oklch(63.1% 0.102 158.3)
-
Step 600
600 (this color)
#288559
oklch(55.1% 0.111 158.5)
-
Step 700
700
#1B724A
oklch(49.1% 0.103 158.3)
-
Step 800
800
#1A5D3D
oklch(42.8% 0.086 158.4)
-
Step 900
900
#1D4C34
oklch(37.6% 0.066 158.5)
-
Step 950
950
#122D1F
oklch(27.1% 0.043 159.1)
#288559 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) | #847B56 | 0.103 |
| Deuteranopia (no green cones) | #78725C | 0.101 |
| Tritanopia (no blue cones) | #008479 | 0.049 |
| Achromatopsia (no color) | #757575 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288559
#288559
oklch(55.1% 0.111 158.5)
- #9B5688
#9B5688
oklch(55% 0.112 338.2)
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 #288559, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.021
- Jungle Green #048243 ΔE 0.035
- Viridian #1E9167 ΔE 0.036
- Dark Sage #598556 ΔE 0.042
- Light Forest Green #4F9153 ΔE 0.053
- Fern Green #548D44 ΔE 0.054
- Military Green #667C3E ΔE 0.061
- Swamp #698339 ΔE 0.065
Use #288559 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.