#288771
Closest named color: Dark Cyan (#008B8B). oklch(56.3% 0.094 174), rgb(40, 135, 113).
Aa
Black text reads best on this color (4.79:1).
About this color
#288771 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.094 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.038 away. Black text reads best on it, at 4.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.79:1 |
| White text | 4.38:1 |
Values
| HEX | #288771 |
| RGB | rgb(40, 135, 113) |
| HSL | hsl(166, 54%, 34%) |
| OKLCH | oklch(56.3% 0.094 174) |
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 #288771 | 4.38:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #288771 | 4.79:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #288771 text on white | 4.38:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #288771 text on black | 4.79:1 | AA | Lc -31.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADED8
oklch(88.4% 0.023 175.9)
-
Step 300
300
#A5CABE
oklch(80.9% 0.043 173.5)
-
Step 400
400
#73AF9D
oklch(70.8% 0.068 173.4)
-
Step 500
500
#4A9B85
oklch(63.2% 0.087 173.3)
-
Step 600
600 (this color)
#288771
oklch(56.3% 0.094 174)
-
Step 700
700
#15715D
oklch(49.2% 0.088 173.8)
-
Step 800
800
#175C4C
oklch(42.8% 0.072 173.8)
-
Step 900
900
#1B4B3F
oklch(37.6% 0.056 174)
-
Step 950
950
#112C25
oklch(26.9% 0.036 174.4)
#288771 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) | #827E70 | 0.097 |
| Deuteranopia (no green cones) | #757573 | 0.093 |
| Tritanopia (no blue cones) | #008981 | 0.024 |
| Achromatopsia (no color) | #797979 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288771
#288771
oklch(56.3% 0.094 174)
- #A05D79
#A05D79
oklch(56.3% 0.094 354)
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 #288771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.038
- Viridian #1E9167 ΔE 0.039
- Teal #008080 ΔE 0.039
- Sea Green #2E8B57 ΔE 0.043
- Dusty Teal #4C9085 ΔE 0.049
- Dark Sage #598556 ΔE 0.050
- Bluegreen #017A79 ΔE 0.050
- Teal Green #0A9396 ΔE 0.056
Use #288771 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.