#288A6E
Closest named color: Viridian (#1E9167). oklch(57% 0.1 169.7), rgb(40, 138, 110).
Aa
Black text reads best on this color (4.95:1).
About this color
#288A6E is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.100 and its hue 170°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.027 away. Black text reads best on it, at 4.95:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 4.95:1 |
| White text | 4.24:1 |
Values
| HEX | #288A6E |
| RGB | rgb(40, 138, 110) |
| HSL | hsl(163, 55%, 35%) |
| OKLCH | oklch(57% 0.1 169.7) |
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 #288A6E | 4.24:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #288A6E | 4.95:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #288A6E text on white | 4.24:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #288A6E text on black | 4.95:1 | AA | Lc -32.7 | 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
#A5CABC
oklch(80.8% 0.044 170.2)
-
Step 400
400
#72AF99
oklch(70.6% 0.071 169.5)
-
Step 500
500
#489B81
oklch(63% 0.091 170.3)
-
Step 600
600 (this color)
#288A6E
oklch(57% 0.1 169.7)
-
Step 700
700
#117158
oklch(49% 0.093 169.7)
-
Step 800
800
#145C48
oklch(42.6% 0.077 169.7)
-
Step 900
900
#1A4C3C
oklch(37.8% 0.061 168.8)
-
Step 950
950
#112C23
oklch(26.9% 0.037 169.3)
#288A6E 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) | #86816D | 0.101 |
| Deuteranopia (no green cones) | #797770 | 0.097 |
| Tritanopia (no blue cones) | #008B82 | 0.030 |
| Achromatopsia (no color) | #7B7B7B | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288A6E
#288A6E
oklch(57% 0.1 169.7)
- #A35E80
#A35E80
oklch(57.1% 0.099 349.8)
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 #288A6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.027
- Sea Green #2E8B57 ΔE 0.034
- Dark Cyan #008B8B ΔE 0.043
- Dark Sage #598556 ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.049
- Ocean Green #3D9973 ΔE 0.049
- Teal #008080 ΔE 0.050
- Light Forest Green #4F9153 ΔE 0.055
Use #288A6E 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.