#288657
Closest named color: Sea Green (#2E8B57). oklch(55.3% 0.114 157.1), rgb(40, 134, 87).
Aa
Black text reads best on this color (4.63:1).
About this color
#288657 is a medium-dark, moderately saturated green. In OKLCH its lightness is 55%, its chroma 0.114 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.017 away. Black text reads best on it, at 4.63:1.
| Hue family | Greens |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #288657 |
| RGB | rgb(40, 134, 87) |
| HSL | hsl(150, 54%, 34%) |
| OKLCH | oklch(55.3% 0.114 157.1) |
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 #288657 | 4.52:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #288657 | 4.63:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #288657 text on white | 4.52:1 | AA | Lc 71.1 | Content text, not long reading |
| #288657 text on black | 4.63:1 | AA | Lc -30.6 | 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
#A6CBB4
oklch(80.9% 0.051 157.8)
-
Step 400
400
#74B08C
oklch(70.6% 0.082 157.2)
-
Step 500
500
#4C9C70
oklch(63% 0.104 157.4)
-
Step 600
600 (this color)
#288657
oklch(55.3% 0.114 157.1)
-
Step 700
700
#1A7248
oklch(49.1% 0.105 157.3)
-
Step 800
800
#195D3B
oklch(42.7% 0.088 157.1)
-
Step 900
900
#1D4C33
oklch(37.6% 0.067 157.5)
-
Step 950
950
#122D1E
oklch(27.1% 0.044 157.4)
#288657 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) | #857B54 | 0.104 |
| Deuteranopia (no green cones) | #79735A | 0.101 |
| Tritanopia (no blue cones) | #00857A | 0.053 |
| Achromatopsia (no color) | #767676 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288657
#288657
oklch(55.3% 0.114 157.1)
- #9C568A
#9C568A
oklch(55.2% 0.114 337.4)
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 #288657, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.017
- Jungle Green #048243 ΔE 0.033
- Viridian #1E9167 ΔE 0.034
- Dark Sage #598556 ΔE 0.042
- Light Forest Green #4F9153 ΔE 0.049
- Fern Green #548D44 ΔE 0.050
- Military Green #667C3E ΔE 0.060
- Swamp #698339 ΔE 0.063
Use #288657 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.