#288B6E
Closest named color: Viridian (#1E9167). oklch(57.3% 0.101 169.2), rgb(40, 139, 110).
Aa
Black text reads best on this color (5.00:1).
About this color
#288B6E is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.101 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.024 away. Black text reads best on it, at 5.00:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #288B6E |
| RGB | rgb(40, 139, 110) |
| HSL | hsl(162, 55%, 35%) |
| OKLCH | oklch(57.3% 0.101 169.2) |
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 #288B6E | 4.19:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #288B6E | 5.00:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #288B6E text on white | 4.19:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #288B6E text on black | 5.00:1 | AA | Lc -33.1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE8
oklch(93.6% 0.013 167.2)
-
Step 200
200
#CADFD6
oklch(88.5% 0.026 168.2)
-
Step 300
300
#A5CBBC
oklch(81% 0.046 169.2)
-
Step 400
400
#72B099
oklch(70.8% 0.073 168.8)
-
Step 500
500
#479C80
oklch(63.2% 0.094 169.1)
-
Step 600
600 (this color)
#288B6E
oklch(57.3% 0.101 169.2)
-
Step 700
700
#0F7158
oklch(49% 0.093 169.8)
-
Step 800
800
#135C48
oklch(42.6% 0.077 169.9)
-
Step 900
900
#1A4C3C
oklch(37.8% 0.061 168.8)
-
Step 950
950
#112C23
oklch(26.9% 0.037 169.3)
#288B6E 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) | #87816D | 0.103 |
| Deuteranopia (no green cones) | #7A7870 | 0.098 |
| Tritanopia (no blue cones) | #008C83 | 0.031 |
| Achromatopsia (no color) | #7C7C7C | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288B6E
#288B6E
oklch(57.3% 0.101 169.2)
- #A45E81
#A45E81
oklch(57.2% 0.101 349.4)
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 #288B6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.024
- Sea Green #2E8B57 ΔE 0.033
- Dark Cyan #008B8B ΔE 0.044
- Dark Sage #598556 ΔE 0.045
- Ocean Green #3D9973 ΔE 0.046
- Dusty Teal #4C9085 ΔE 0.048
- Light Forest Green #4F9153 ΔE 0.052
- Teal #008080 ΔE 0.053
Use #288B6E 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.