#28524B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.6% 0.049 181.7), rgb(40, 82, 75).
Aa
White text reads best on this color (8.75:1).
About this color
#28524B is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.049 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.016 away. White text reads best on it, at 8.75:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #28524B |
| RGB | rgb(40, 82, 75) |
| HSL | hsl(170, 34%, 24%) |
| OKLCH | oklch(40.6% 0.049 181.7) |
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 #28524B | 8.75:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #28524B | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #28524B text on white | 8.75:1 | AAA | Lc 89.9 | Fine for body text |
| #28524B text on black | 2.39:1 | Fails | Lc -12.4 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDDA
oklch(88.5% 0.017 182.7)
-
Step 300
300
#AEC7C2
oklch(80.9% 0.028 182.2)
-
Step 400
400
#82AAA2
oklch(70.6% 0.045 181.3)
-
Step 500
500
#61958C
oklch(63% 0.057 182.3)
-
Step 600
600
#468076
oklch(55.7% 0.063 181.5)
-
Step 700
700
#376C63
oklch(49.2% 0.059 181.4)
-
Step 800
800 (this color)
#28524B
oklch(40.6% 0.049 181.7)
-
Step 900
900
#2A4843
oklch(37.6% 0.037 182.5)
-
Step 950
950
#192A27
oklch(26.9% 0.023 182.2)
#28524B 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) | #4F4E4B | 0.052 |
| Deuteranopia (no green cones) | #48494C | 0.049 |
| Tritanopia (no blue cones) | #155350 | 0.015 |
| Achromatopsia (no color) | #4B4B4B | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28524B
#28524B
oklch(40.6% 0.049 181.7)
- #603E47
#603E47
oklch(40.6% 0.049 2.2)
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 #28524B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.016
- Dark Blue Green #005249 ΔE 0.025
- Deep Teal #00555A ΔE 0.029
- Dark Teal #014D4E ΔE 0.033
- Charcoal #264653 ΔE 0.047
- Dark Green Blue #1F6357 ΔE 0.053
- Petrol #005F6A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
Use #28524B 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.