#288F5F
Closest named color: Viridian (#1E9167). oklch(58% 0.119 158.4), rgb(40, 143, 95).
Aa
Black text reads best on this color (5.18:1).
About this color
#288F5F is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.119 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.011 away. Black text reads best on it, at 5.18:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.119) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.18:1 |
| White text | 4.05:1 |
Values
| HEX | #288F5F |
| RGB | rgb(40, 143, 95) |
| HSL | hsl(152, 56%, 36%) |
| OKLCH | oklch(58% 0.119 158.4) |
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 #288F5F | 4.05:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #288F5F | 5.18:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #288F5F text on white | 4.05:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #288F5F text on black | 5.18:1 | AA | Lc -34.3 | 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
#A4CCB4
oklch(81% 0.054 158.6)
-
Step 400
400
#71B18D
oklch(70.7% 0.085 158.6)
-
Step 500
500
#469D70
oklch(63% 0.109 158.4)
-
Step 600
600 (this color)
#288F5F
oklch(58% 0.119 158.4)
-
Step 700
700
#0A7348
oklch(49.1% 0.111 158.3)
-
Step 800
800
#115E3B
oklch(42.8% 0.093 158)
-
Step 900
900
#184D33
oklch(37.7% 0.072 158.5)
-
Step 950
950
#102D1E
oklch(27% 0.045 158.6)
#288F5F 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) | #8E845C | 0.111 |
| Deuteranopia (no green cones) | #817A62 | 0.109 |
| Tritanopia (no blue cones) | #008E82 | 0.052 |
| Achromatopsia (no color) | #7E7E7E | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288F5F
#288F5F
oklch(58% 0.119 158.4)
- #A75C92
#A75C92
oklch(57.9% 0.12 338.5)
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 #288F5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.011
- Sea Green #2E8B57 ΔE 0.013
- Light Forest Green #4F9153 ΔE 0.032
- Fern Green #548D44 ΔE 0.041
- Ocean Green #3D9973 ΔE 0.041
- Dark Sage #598556 ΔE 0.044
- Jungle Green #048243 ΔE 0.052
- Kelley Green #009337 ΔE 0.057
Use #288F5F 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.