#288D83
Closest named color: Dark Cyan (#008B8B). oklch(58.4% 0.091 185.4), rgb(40, 141, 131).
Aa
Black text reads best on this color (5.22:1).
About this color
#288D83 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.091 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.019 away. Black text reads best on it, at 5.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #288D83 |
| RGB | rgb(40, 141, 131) |
| HSL | hsl(174, 56%, 35%) |
| OKLCH | oklch(58.4% 0.091 185.4) |
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 #288D83 | 4.01:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #288D83 | 5.22:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #288D83 text on white | 4.01:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #288D83 text on black | 5.22:1 | AA | Lc -34.5 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEB
oklch(93.7% 0.012 184.1)
-
Step 200
200
#C9DEDB
oklch(88.4% 0.023 186.4)
-
Step 300
300
#A4CAC4
oklch(81% 0.041 184.7)
-
Step 400
400
#70AEA6
oklch(70.6% 0.065 185.6)
-
Step 500
500
#449A90
oklch(63.1% 0.084 185.1)
-
Step 600
600 (this color)
#288D83
oklch(58.4% 0.091 185.4)
-
Step 700
700
#067067
oklch(49.1% 0.085 185.1)
-
Step 800
800
#0F5B54
oklch(42.6% 0.07 185.4)
-
Step 900
900
#184B46
oklch(37.7% 0.054 186.1)
-
Step 950
950
#102C29
oklch(27% 0.034 186.1)
#288D83 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) | #868583 | 0.098 |
| Deuteranopia (no green cones) | #777A84 | 0.092 |
| Tritanopia (no blue cones) | #00908A | 0.014 |
| Achromatopsia (no color) | #7F7F7F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288D83
#288D83
oklch(58.4% 0.091 185.4)
- #A96474
#A96474
oklch(58.5% 0.091 5.3)
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 #288D83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.019
- Teal Green #0A9396 ΔE 0.029
- Dusty Teal #4C9085 ΔE 0.029
- Blue Green #0F9B8E ΔE 0.040
- Sea #3C9992 ΔE 0.042
- Teal #008080 ΔE 0.044
- Persian Green #2A9D8F ΔE 0.047
- Viridian #1E9167 ΔE 0.048
Use #288D83 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.