#288581
Closest named color: Dark Cyan (#008B8B). oklch(56.3% 0.085 190.8), rgb(40, 133, 129).
Aa
Black text reads best on this color (4.76:1).
About this color
#288581 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.085 and its hue 191°. 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 4.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #288581 |
| RGB | rgb(40, 133, 129) |
| HSL | hsl(177, 54%, 34%) |
| OKLCH | oklch(56.3% 0.085 190.8) |
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 #288581 | 4.40:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #288581 | 4.76:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #288581 text on white | 4.40:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #288581 text on black | 4.76:1 | AA | Lc -31.4 | 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
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A5C9C6
oklch(80.9% 0.039 190.2)
-
Step 400
400
#73ADA9
oklch(70.7% 0.061 190.4)
-
Step 500
500
#4A9995
oklch(63.2% 0.078 191)
-
Step 600
600 (this color)
#288581
oklch(56.3% 0.085 190.8)
-
Step 700
700
#156F6B
oklch(49.2% 0.079 190.3)
-
Step 800
800
#175A57
oklch(42.6% 0.065 190.6)
-
Step 900
900
#1B4A48
oklch(37.6% 0.051 191.4)
-
Step 950
950
#112B2A
oklch(26.8% 0.032 192.1)
#288581 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) | #7D7E81 | 0.089 |
| Deuteranopia (no green cones) | #6F7482 | 0.084 |
| Tritanopia (no blue cones) | #008984 | 0.015 |
| Achromatopsia (no color) | #787878 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288581
#288581
oklch(56.3% 0.085 190.8)
- #A06069
#A06069
oklch(56.3% 0.084 11)
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 #288581, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.020
- Teal #008080 ΔE 0.022
- Bluegreen #017A79 ΔE 0.039
- Teal Green #0A9396 ΔE 0.044
- Deep Aqua #08787F ΔE 0.044
- Teal Blue #01889F ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.046
- Ocean #017B92 ΔE 0.049
Use #288581 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.