#28574C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.055 176.2), rgb(40, 87, 76).
Aa
White text reads best on this color (8.20:1).
About this color
#28574C is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.055 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 8.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #28574C |
| RGB | rgb(40, 87, 76) |
| HSL | hsl(166, 37%, 25%) |
| OKLCH | oklch(42% 0.055 176.2) |
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 #28574C | 8.20:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #28574C | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #28574C text on white | 8.20:1 | AAA | Lc 88.2 | Fine for body text |
| #28574C text on black | 2.55:1 | Fails | Lc -13.9 | 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 800.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECE9
oklch(93.6% 0.009 171.8)
-
Step 200
200
#CEDDD9
oklch(88.5% 0.017 178.2)
-
Step 300
300
#ACC8C0
oklch(81% 0.032 176.4)
-
Step 400
400
#7FAC9F
oklch(70.8% 0.052 175)
-
Step 500
500
#5C9788
oklch(63.1% 0.066 176.1)
-
Step 600
600
#408172
oklch(55.6% 0.071 176.6)
-
Step 700
700
#316D5F
oklch(49% 0.067 176)
-
Step 800
800 (this color)
#28574C
oklch(42% 0.055 176.2)
-
Step 900
900
#274941
oklch(37.7% 0.042 177)
-
Step 950
950
#172B26
oklch(27% 0.028 176.4)
#28574C 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) | #54524C | 0.058 |
| Deuteranopia (no green cones) | #4D4D4D | 0.055 |
| Tritanopia (no blue cones) | #135854 | 0.017 |
| Achromatopsia (no color) | #4F4F4F | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28574C
#28574C
oklch(42% 0.055 176.2)
- #65404E
#65404E
oklch(41.9% 0.055 355.4)
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 #28574C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Dark Blue Green #005249 ΔE 0.031
- Deep Teal #00555A ΔE 0.033
- Dark Green Blue #1F6357 ΔE 0.037
- Dark Teal #014D4E ΔE 0.045
- Pine #2B5D34 ΔE 0.047
- Petrol #005F6A ΔE 0.048
- Spruce #0A5F38 ΔE 0.051
Use #28574C 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.