#288C4A
Closest named color: Sea Green (#2E8B57). oklch(56.7% 0.135 150.5), rgb(40, 140, 74).
Aa
Black text reads best on this color (4.94:1).
About this color
#288C4A is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.135 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 0.019 away. Black text reads best on it, at 4.94:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.94:1 |
| White text | 4.25:1 |
Values
| HEX | #288C4A |
| RGB | rgb(40, 140, 74) |
| HSL | hsl(140, 56%, 35%) |
| OKLCH | oklch(56.7% 0.135 150.5) |
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 #288C4A | 4.25:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #288C4A | 4.94:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #288C4A text on white | 4.25:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #288C4A text on black | 4.94:1 | AA | Lc -32.7 | 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
#A5CCAD
oklch(80.8% 0.06 151)
-
Step 400
400
#72B281
oklch(70.7% 0.097 150.7)
-
Step 500
500
#499E61
oklch(63.1% 0.123 150.7)
-
Step 600
600 (this color)
#288C4A
oklch(56.7% 0.135 150.5)
-
Step 700
700
#137438
oklch(49.2% 0.126 150.4)
-
Step 800
800
#155E2F
oklch(42.6% 0.104 150.7)
-
Step 900
900
#1A4D2A
oklch(37.6% 0.081 150.9)
-
Step 950
950
#112D19
oklch(26.9% 0.051 151)
#288C4A 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) | #8D8045 | 0.113 |
| Deuteranopia (no green cones) | #81774F | 0.112 |
| Tritanopia (no blue cones) | #008A7C | 0.073 |
| Achromatopsia (no color) | #7B7B7B | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288C4A
#288C4A
oklch(56.7% 0.135 150.5)
- #A2569B
#A2569B
oklch(56.8% 0.134 330.7)
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 #288C4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.019
- Fern Green #548D44 ΔE 0.035
- Jungle Green #048243 ΔE 0.035
- Kelley Green #009337 ΔE 0.037
- Viridian #1E9167 ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.038
- Forest Green #228B22 ΔE 0.040
- Emerald Green #028F1E ΔE 0.049
Use #288C4A 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.