#288A6F
Closest named color: Viridian (#1E9167). oklch(57% 0.099 170.5), rgb(40, 138, 111).
Aa
Black text reads best on this color (4.95:1).
About this color
#288A6F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.099 and its hue 170°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.028 away. Black text reads best on it, at 4.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #288A6F |
| RGB | rgb(40, 138, 111) |
| HSL | hsl(163, 55%, 35%) |
| OKLCH | oklch(57% 0.099 170.5) |
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 #288A6F | 4.23:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #288A6F | 4.95:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #288A6F text on white | 4.23:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #288A6F 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
#CADFD7
oklch(88.6% 0.025 170.9)
-
Step 300
300
#A5CABC
oklch(80.8% 0.044 170.2)
-
Step 400
400
#72AF9A
oklch(70.6% 0.071 170.5)
-
Step 500
500
#489B82
oklch(63% 0.09 171.1)
-
Step 600
600 (this color)
#288A6F
oklch(57% 0.099 170.5)
-
Step 700
700
#117159
oklch(49.1% 0.092 170.5)
-
Step 800
800
#145C49
oklch(42.6% 0.076 170.8)
-
Step 900
900
#1A4C3D
oklch(37.8% 0.06 170.2)
-
Step 950
950
#112C24
oklch(26.9% 0.037 171.8)
#288A6F 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) | #86816E | 0.101 |
| Deuteranopia (no green cones) | #797771 | 0.097 |
| Tritanopia (no blue cones) | #008B82 | 0.028 |
| Achromatopsia (no color) | #7B7B7B | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288A6F
#288A6F
oklch(57% 0.099 170.5)
- #A35E7F
#A35E7F
oklch(57% 0.099 350.6)
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 #288A6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.028
- Sea Green #2E8B57 ΔE 0.035
- Dark Cyan #008B8B ΔE 0.042
- Dark Sage #598556 ΔE 0.046
- Dusty Teal #4C9085 ΔE 0.048
- Teal #008080 ΔE 0.049
- Ocean Green #3D9973 ΔE 0.049
- Slate Green #658D6D ΔE 0.056
Use #288A6F 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.