#28474C
Closest named color: Charcoal (#264653). oklch(37.6% 0.038 208.8), rgb(40, 71, 76).
Aa
White text reads best on this color (10.01:1).
About this color
#28474C is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.038 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.014 away. White text reads best on it, at 10.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.09:1 |
| White text | 10.01:1 |
Values
| HEX | #28474C |
| RGB | rgb(40, 71, 76) |
| HSL | hsl(188, 31%, 23%) |
| OKLCH | oklch(37.6% 0.038 208.8) |
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 #28474C | 10.01:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #28474C | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #28474C text on white | 10.01:1 | AAA | Lc 93.2 | Preferred for body text |
| #28474C text on black | 2.09:1 | Fails | Lc -9.3 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCDF
oklch(88.5% 0.016 212)
-
Step 300
300
#ADC6CA
oklch(80.9% 0.028 208.3)
-
Step 400
400
#80A9B0
oklch(70.7% 0.045 209.1)
-
Step 500
500
#5E949C
oklch(63.2% 0.058 207.7)
-
Step 600
600
#437E87
oklch(55.7% 0.063 208.3)
-
Step 700
700
#346A72
oklch(49.1% 0.058 208.1)
-
Step 800
800
#2C565D
oklch(42.6% 0.048 209.4)
-
Step 900
900 (this color)
#28474C
oklch(37.6% 0.038 208.8)
-
Step 950
950
#182A2D
oklch(27.1% 0.024 209.1)
#28474C 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) | #42454C | 0.036 |
| Deuteranopia (no green cones) | #3C404C | 0.034 |
| Tritanopia (no blue cones) | #184A48 | 0.020 |
| Achromatopsia (no color) | #424242 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28474C
#28474C
oklch(37.6% 0.038 208.8)
- #543A36
#543A36
oklch(37.7% 0.038 28.8)
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 #28474C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.014
- Dark Grey Blue #29465B ΔE 0.028
- Dark Slate Gray #2F4F4F ΔE 0.028
- Dark Teal #014D4E ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.031
- Onyx #343A40 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.044
- Dark Blue Green #005249 ΔE 0.044
Use #28474C 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.