#288C6F
Closest named color: Viridian (#1E9167). oklch(57.6% 0.101 169.4), rgb(40, 140, 111).
Aa
Black text reads best on this color (5.07:1).
About this color
#288C6F is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, 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 0.023 away. Black text reads best on it, at 5.07:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.07:1 |
| White text | 4.14:1 |
Values
| HEX | #288C6F |
| RGB | rgb(40, 140, 111) |
| HSL | hsl(163, 56%, 35%) |
| OKLCH | oklch(57.6% 0.101 169.4) |
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 #288C6F | 4.14:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #288C6F | 5.07:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #288C6F text on white | 4.14:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #288C6F text on black | 5.07:1 | AA | Lc -33.5 | 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
#71B099
oklch(70.8% 0.074 169.1)
-
Step 500
500
#479C80
oklch(63.2% 0.094 169.1)
-
Step 600
600 (this color)
#288C6F
oklch(57.6% 0.101 169.4)
-
Step 700
700
#0D7158
oklch(49% 0.094 169.9)
-
Step 800
800
#125C48
oklch(42.6% 0.077 170)
-
Step 900
900
#194C3C
oklch(37.7% 0.061 169.1)
-
Step 950
950
#102C23
oklch(26.8% 0.038 169.8)
#288C6F 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) | #88826E | 0.103 |
| Deuteranopia (no green cones) | #7B7971 | 0.099 |
| Tritanopia (no blue cones) | #008D84 | 0.031 |
| Achromatopsia (no color) | #7D7D7D | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288C6F
#288C6F
oklch(57.6% 0.101 169.4)
- #A55F82
#A55F82
oklch(57.6% 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 #288C6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.023
- Sea Green #2E8B57 ΔE 0.033
- Ocean Green #3D9973 ΔE 0.043
- Dark Cyan #008B8B ΔE 0.044
- Dark Sage #598556 ΔE 0.046
- Dusty Teal #4C9085 ΔE 0.046
- Light Forest Green #4F9153 ΔE 0.051
- Blue Green #0F9B8E ΔE 0.053
Use #288C6F 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.