#28504E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.1% 0.045 191.3), rgb(40, 80, 78).
Aa
White text reads best on this color (8.94:1).
About this color
#28504E is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.045 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.008 away. White text reads best on it, at 8.94:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #28504E |
| RGB | rgb(40, 80, 78) |
| HSL | hsl(177, 33%, 24%) |
| OKLCH | oklch(40.1% 0.045 191.3) |
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 #28504E | 8.94:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #28504E | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #28504E text on white | 8.94:1 | AAA | Lc 90.4 | Preferred for body text |
| #28504E text on black | 2.34:1 | Fails | Lc -11.9 | 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 900.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A8C8C6
oklch(80.9% 0.034 191.8)
-
Step 400
400
#78ACA9
oklch(70.7% 0.055 191.5)
-
Step 500
500
#539794
oklch(63.1% 0.069 191.8)
-
Step 600
600
#34817E
oklch(55.5% 0.075 191.7)
-
Step 700
700
#256D6A
oklch(49% 0.07 191.2)
-
Step 800
800
#215957
oklch(42.7% 0.058 191.9)
-
Step 900
900 (this color)
#28504E
oklch(40.1% 0.045 191.3)
-
Step 950
950
#142B2A
oklch(27% 0.029 191.9)
#28504E 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) | #4C4C4E | 0.048 |
| Deuteranopia (no green cones) | #45474E | 0.045 |
| Tritanopia (no blue cones) | #14524F | 0.016 |
| Achromatopsia (no color) | #494949 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28504E
#28504E
oklch(40.1% 0.045 191.3)
- #5E3E42
#5E3E42
oklch(40.2% 0.045 11.1)
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 #28504E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.008
- Deep Teal #00555A ΔE 0.027
- Dark Blue Green #005249 ΔE 0.028
- Dark Teal #014D4E ΔE 0.028
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.049
- Petrol #005F6A ΔE 0.056
Use #28504E 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.