#288663
Closest named color: Sea Green (#2E8B57). oklch(55.6% 0.103 164.1), rgb(40, 134, 99).
Aa
Black text reads best on this color (4.68:1).
About this color
#288663 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.103 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.027 away. Black text reads best on it, at 4.68:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.68:1 |
| White text | 4.48:1 |
Values
| HEX | #288663 |
| RGB | rgb(40, 134, 99) |
| HSL | hsl(158, 54%, 34%) |
| OKLCH | oklch(55.6% 0.103 164.1) |
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 #288663 | 4.48:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #288663 | 4.68:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #288663 text on white | 4.48:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #288663 text on black | 4.68:1 | AA | Lc -30.9 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE7
oklch(93.6% 0.014 162.5)
-
Step 200
200
#CADFD5
oklch(88.5% 0.026 165.6)
-
Step 300
300
#A6CBB9
oklch(81% 0.047 164.2)
-
Step 400
400
#74B094
oklch(70.8% 0.075 163.6)
-
Step 500
500
#4B9C7A
oklch(63.2% 0.096 163.9)
-
Step 600
600 (this color)
#288663
oklch(55.6% 0.103 164.1)
-
Step 700
700
#187152
oklch(49% 0.095 164.4)
-
Step 800
800
#185C43
oklch(42.6% 0.079 164.3)
-
Step 900
900
#1C4C39
oklch(37.7% 0.062 164.4)
-
Step 950
950
#122C21
oklch(26.8% 0.039 164.2)
#288663 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) | #837C61 | 0.100 |
| Deuteranopia (no green cones) | #777365 | 0.098 |
| Tritanopia (no blue cones) | #00867C | 0.038 |
| Achromatopsia (no color) | #777777 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288663
#288663
oklch(55.6% 0.103 164.1)
- #9D5982
#9D5982
oklch(55.5% 0.104 344)
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 #288663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.027
- Viridian #1E9167 ΔE 0.032
- Dark Sage #598556 ΔE 0.042
- Jungle Green #048243 ΔE 0.048
- Teal #008080 ΔE 0.054
- Light Forest Green #4F9153 ΔE 0.055
- Dark Cyan #008B8B ΔE 0.057
- Fern Green #548D44 ΔE 0.060
Use #288663 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.