#28404D
Closest named color: Charcoal (#264653). oklch(35.8% 0.037 232.9), rgb(40, 64, 77).
Aa
White text reads best on this color (10.87:1).
About this color
#28404D is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.037 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.019 away. White text reads best on it, at 10.87:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #28404D |
| RGB | rgb(40, 64, 77) |
| HSL | hsl(201, 32%, 23%) |
| OKLCH | oklch(35.8% 0.037 232.9) |
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 #28404D | 10.87:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #28404D | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #28404D text on white | 10.87:1 | AAA | Lc 95.1 | Preferred for body text |
| #28404D text on black | 1.93:1 | Fails | Lc -7.5 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D0
oklch(80.9% 0.028 234.1)
-
Step 400
400
#85A6B8
oklch(70.7% 0.045 232.1)
-
Step 500
500
#6690A7
oklch(63.1% 0.058 232.8)
-
Step 600
600
#4D7A92
oklch(55.7% 0.062 232.7)
-
Step 700
700
#3D677C
oklch(49.2% 0.058 231.3)
-
Step 800
800
#335465
oklch(42.8% 0.048 231.9)
-
Step 900
900 (this color)
#28404D
oklch(35.8% 0.037 232.9)
-
Step 950
950
#1B2930
oklch(27.1% 0.023 230.3)
#28404D 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) | #3A3F4E | 0.026 |
| Deuteranopia (no green cones) | #353B4D | 0.023 |
| Tritanopia (no blue cones) | #194444 | 0.029 |
| Achromatopsia (no color) | #3D3D3D | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28404D
#28404D
oklch(35.8% 0.037 232.9)
- #4C372A
#4C372A
oklch(35.7% 0.037 52.9)
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 #28404D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.021
- Dark Grey Blue #29465B ΔE 0.027
- Onyx #343A40 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.034
- Midnight Green #073B4C ΔE 0.036
- Gunmetal #293241 ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
Use #28404D 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.