#288B7F
Closest named color: Dark Cyan (#008B8B). oklch(57.8% 0.091 183.3), rgb(40, 139, 127).
Aa
Black text reads best on this color (5.08:1).
About this color
#288B7F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.091 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.020 away. Black text reads best on it, at 5.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #288B7F |
| RGB | rgb(40, 139, 127) |
| HSL | hsl(173, 55%, 35%) |
| OKLCH | oklch(57.8% 0.091 183.3) |
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 #288B7F | 4.12:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #288B7F | 5.08:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #288B7F text on white | 4.12:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #288B7F text on black | 5.08:1 | AA | Lc -33.6 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A4CAC3
oklch(80.9% 0.042 182.8)
-
Step 400
400
#71AEA5
oklch(70.7% 0.065 184.2)
-
Step 500
500
#469A8E
oklch(63.1% 0.084 182.9)
-
Step 600
600 (this color)
#288B7F
oklch(57.8% 0.091 183.3)
-
Step 700
700
#0C7065
oklch(49.1% 0.085 182.9)
-
Step 800
800
#115B53
oklch(42.6% 0.07 184)
-
Step 900
900
#194B44
oklch(37.7% 0.055 182.6)
-
Step 950
950
#102C28
oklch(27% 0.035 183.1)
#288B7F 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) | #84837F | 0.096 |
| Deuteranopia (no green cones) | #767980 | 0.090 |
| Tritanopia (no blue cones) | #008E87 | 0.015 |
| Achromatopsia (no color) | #7D7D7D | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288B7F
#288B7F
oklch(57.8% 0.091 183.3)
- #A66274
#A66274
oklch(57.7% 0.09 3.2)
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 #288B7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.020
- Dusty Teal #4C9085 ΔE 0.034
- Teal Green #0A9396 ΔE 0.035
- Teal #008080 ΔE 0.039
- Blue Green #0F9B8E ΔE 0.046
- Viridian #1E9167 ΔE 0.046
- Sea #3C9992 ΔE 0.049
- Persian Green #2A9D8F ΔE 0.054
Use #288B7F 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.