#28574B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.056 174.6), rgb(40, 87, 75).
Aa
White text reads best on this color (8.21:1).
About this color
#28574B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.056 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.030 away. White text reads best on it, at 8.21:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #28574B |
| RGB | rgb(40, 87, 75) |
| HSL | hsl(165, 37%, 25%) |
| OKLCH | oklch(42% 0.056 174.6) |
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 #28574B | 8.21:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #28574B | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #28574B text on white | 8.21:1 | AAA | Lc 88.3 | Fine for body text |
| #28574B 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
#CEDDD8
oklch(88.5% 0.017 174)
-
Step 300
300
#ACC8BF
oklch(80.9% 0.033 174.1)
-
Step 400
400
#7FAC9E
oklch(70.8% 0.053 173.6)
-
Step 500
500
#5C9787
oklch(63.1% 0.067 174.9)
-
Step 600
600
#408171
oklch(55.5% 0.072 175.4)
-
Step 700
700
#326D5E
oklch(49.1% 0.067 174.5)
-
Step 800
800 (this color)
#28574B
oklch(42% 0.056 174.6)
-
Step 900
900
#274940
oklch(37.6% 0.043 174.9)
-
Step 950
950
#172B26
oklch(27% 0.028 176.4)
#28574B 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) | #54524A | 0.058 |
| Deuteranopia (no green cones) | #4D4D4C | 0.055 |
| Tritanopia (no blue cones) | #135853 | 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°).
- #28574B
#28574B
oklch(42% 0.056 174.6)
- #65404F
#65404F
oklch(41.9% 0.056 353.8)
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 #28574B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.030
- Dark Blue Green #005249 ΔE 0.031
- Deep Teal #00555A ΔE 0.034
- Dark Green Blue #1F6357 ΔE 0.037
- Dark Teal #014D4E ΔE 0.046
- Pine #2B5D34 ΔE 0.046
- Petrol #005F6A ΔE 0.050
- Spruce #0A5F38 ΔE 0.050
Use #28574B 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.