#28858F
Closest named color: Dark Cyan (#008B8B). oklch(56.8% 0.085 205.5), rgb(40, 133, 143).
Aa
Black text reads best on this color (4.84:1).
About this color
#28858F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.085 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.023 away. Black text reads best on it, at 4.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #28858F |
| RGB | rgb(40, 133, 143) |
| HSL | hsl(186, 56%, 36%) |
| OKLCH | oklch(56.8% 0.085 205.5) |
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 #28858F | 4.33:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #28858F | 4.84:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #28858F text on white | 4.33:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #28858F text on black | 4.84:1 | AA | Lc -31.9 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CD
oklch(80.9% 0.038 207)
-
Step 400
400
#72ACB3
oklch(70.7% 0.061 205.5)
-
Step 500
500
#4897A0
oklch(63% 0.078 205.3)
-
Step 600
600 (this color)
#28858F
oklch(56.8% 0.085 205.5)
-
Step 700
700
#136D76
oklch(49% 0.079 205.5)
-
Step 800
800
#155960
oklch(42.7% 0.065 205.2)
-
Step 900
900
#1A494F
oklch(37.6% 0.051 206.8)
-
Step 950
950
#112B2E
oklch(27% 0.032 205.4)
#28858F 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) | #7A8090 | 0.084 |
| Deuteranopia (no green cones) | #6B758F | 0.076 |
| Tritanopia (no blue cones) | #008B88 | 0.026 |
| Achromatopsia (no color) | #797979 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28858F
#28858F
oklch(56.8% 0.085 205.5)
- #A3625D
#A3625D
oklch(56.7% 0.085 24.8)
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 #28858F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.023
- Teal Blue #01889F ΔE 0.025
- Teal #008080 ΔE 0.031
- Ocean #017B92 ΔE 0.037
- Teal Green #0A9396 ΔE 0.040
- Deep Aqua #08787F ΔE 0.046
- Cerulean #457B9D ΔE 0.047
- Bluegreen #017A79 ΔE 0.047
Use #28858F 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.