#28515B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.049 215.6), rgb(40, 81, 91).
Aa
White text reads best on this color (8.68:1).
About this color
#28515B is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.049 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.68:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #28515B |
| RGB | rgb(40, 81, 91) |
| HSL | hsl(192, 39%, 26%) |
| OKLCH | oklch(41% 0.049 215.6) |
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 #28515B | 8.68:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #28515B | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #28515B text on white | 8.68:1 | AAA | Lc 89.7 | Fine for body text |
| #28515B text on black | 2.41:1 | Fails | Lc -12.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ADC6CC
oklch(81% 0.028 213.8)
-
Step 400
400
#81A8B3
oklch(70.7% 0.045 216.9)
-
Step 500
500
#5F93A0
oklch(63.2% 0.059 215.3)
-
Step 600
600
#447D8B
oklch(55.6% 0.064 215.5)
-
Step 700
700
#356976
oklch(49% 0.059 216.1)
-
Step 800
800 (this color)
#28515B
oklch(41% 0.049 215.6)
-
Step 900
900
#29474E
oklch(37.7% 0.038 214.2)
-
Step 950
950
#182A2E
oklch(27.1% 0.025 213.2)
#28515B 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) | #4A4F5C | 0.044 |
| Deuteranopia (no green cones) | #42495B | 0.039 |
| Tritanopia (no blue cones) | #055554 | 0.029 |
| Achromatopsia (no color) | #4B4B4B | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28515B
#28515B
oklch(41% 0.049 215.6)
- #624138
#624138
oklch(41% 0.049 35.9)
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 #28515B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Deep Teal #00555A ΔE 0.025
- Charcoal #264653 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.036
- Dark Teal #014D4E ΔE 0.038
- Dark Blue Green #005249 ΔE 0.043
- Petrol #005F6A ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.057
Use #28515B 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.