#288F4A
Closest named color: Sea Green (#2E8B57). oklch(57.5% 0.139 150.1), rgb(40, 143, 74).
Aa
Black text reads best on this color (5.11:1).
About this color
#288F4A is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.139 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.024 away. Black text reads best on it, at 5.11:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #288F4A |
| RGB | rgb(40, 143, 74) |
| HSL | hsl(140, 56%, 36%) |
| OKLCH | oklch(57.5% 0.139 150.1) |
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 #288F4A | 4.10:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #288F4A | 5.11:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #288F4A text on white | 4.10:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #288F4A text on black | 5.11:1 | AA | Lc -33.9 | 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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E2EDE4
oklch(93.5% 0.017 151.1)
-
Step 200
200
#CAE0CD
oklch(88.5% 0.035 149.3)
-
Step 300
300
#A4CDAC
oklch(81% 0.063 150.6)
-
Step 400
400
#71B27F
oklch(70.6% 0.1 150.1)
-
Step 500
500
#479F5F
oklch(63.2% 0.128 150.2)
-
Step 600
600 (this color)
#288F4A
oklch(57.5% 0.139 150.1)
-
Step 700
700
#0E7436
oklch(49.1% 0.129 150.2)
-
Step 800
800
#125F2D
oklch(42.8% 0.108 150.1)
-
Step 900
900
#194E29
oklch(37.8% 0.084 150.3)
-
Step 950
950
#102E18
oklch(27.1% 0.054 150.1)
#288F4A 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) | #908345 | 0.115 |
| Deuteranopia (no green cones) | #837A4F | 0.113 |
| Tritanopia (no blue cones) | #008C7F | 0.078 |
| Achromatopsia (no color) | #7D7D7D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288F4A
#288F4A
oklch(57.5% 0.139 150.1)
- #A6579F
#A6579F
oklch(57.6% 0.139 330.6)
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 #288F4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.024
- Kelley Green #009337 ΔE 0.031
- Fern Green #548D44 ΔE 0.033
- Light Forest Green #4F9153 ΔE 0.034
- Viridian #1E9167 ΔE 0.037
- Forest Green #228B22 ΔE 0.039
- Jungle Green #048243 ΔE 0.044
- Irish Green #019529 ΔE 0.045
Use #288F4A 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.