#288B7C
Closest named color: Dark Cyan (#008B8B). oklch(57.7% 0.092 180.6), rgb(40, 139, 124).
Aa
Black text reads best on this color (5.07:1).
About this color
#288B7C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.092 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.024 away. Black text reads best on it, at 5.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #288B7C |
| RGB | rgb(40, 139, 124) |
| HSL | hsl(171, 55%, 35%) |
| OKLCH | oklch(57.7% 0.092 180.6) |
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 #288B7C | 4.13:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #288B7C | 5.07:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #288B7C text on white | 4.13:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #288B7C 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
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A4CAC2
oklch(80.9% 0.042 181)
-
Step 400
400
#71AFA2
oklch(70.8% 0.067 179.6)
-
Step 500
500
#469A8C
oklch(63% 0.085 181)
-
Step 600
600 (this color)
#288B7C
oklch(57.7% 0.092 180.6)
-
Step 700
700
#0D7063
oklch(49% 0.085 180.8)
-
Step 800
800
#125B51
oklch(42.6% 0.07 181.4)
-
Step 900
900
#194B43
oklch(37.7% 0.055 180.9)
-
Step 950
950
#102C27
oklch(27% 0.035 180.2)
#288B7C 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) | #85837B | 0.097 |
| Deuteranopia (no green cones) | #77787D | 0.093 |
| Tritanopia (no blue cones) | #008D86 | 0.016 |
| Achromatopsia (no color) | #7D7D7D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288B7C
#288B7C
oklch(57.7% 0.092 180.6)
- #A66176
#A66176
oklch(57.6% 0.093 0.8)
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 #288B7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.024
- Dusty Teal #4C9085 ΔE 0.035
- Teal Green #0A9396 ΔE 0.039
- Teal #008080 ΔE 0.041
- Viridian #1E9167 ΔE 0.042
- Blue Green #0F9B8E ΔE 0.047
- Sea #3C9992 ΔE 0.051
- Ocean Green #3D9973 ΔE 0.052
Use #288B7C 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.