#28575B
Closest named color: Deep Teal (#00555A). oklch(42.6% 0.051 202.8), rgb(40, 87, 91).
Aa
White text reads best on this color (8.06:1).
About this color
#28575B is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.051 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.025 away. White text reads best on it, at 8.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #28575B |
| RGB | rgb(40, 87, 91) |
| HSL | hsl(185, 39%, 26%) |
| OKLCH | oklch(42.6% 0.051 202.8) |
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 #28575B | 8.06:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #28575B | 2.60:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #28575B text on white | 8.06:1 | AAA | Lc 87.8 | Fine for body text |
| #28575B text on black | 2.60:1 | Fails | Lc -14.4 | Not readable |
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 800.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#ABC7C9
oklch(81% 0.03 201.9)
-
Step 400
400
#7DAAAE
oklch(70.7% 0.048 203)
-
Step 500
500
#5A959A
oklch(63.1% 0.062 202.6)
-
Step 600
600
#3E7F85
oklch(55.6% 0.067 203.4)
-
Step 700
700
#2F6B70
oklch(49% 0.062 202.7)
-
Step 800
800 (this color)
#28575B
oklch(42.6% 0.051 202.8)
-
Step 900
900
#26484B
oklch(37.7% 0.04 203)
-
Step 950
950
#172A2C
oklch(27% 0.025 204.3)
#28575B 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) | #51545B | 0.052 |
| Deuteranopia (no green cones) | #494D5B | 0.049 |
| Tritanopia (no blue cones) | #025A58 | 0.024 |
| Achromatopsia (no color) | #505050 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28575B
#28575B
oklch(42.6% 0.051 202.8)
- #684341
#684341
oklch(42.5% 0.052 22.9)
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 #28575B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.027
- Petrol #005F6A ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Blue Green #005249 ΔE 0.043
- Dark Teal #014D4E ΔE 0.047
- Charcoal #264653 ΔE 0.055
- Dark Aqua #05696B ΔE 0.055
Use #28575B 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.