#28404A
Closest named color: Charcoal (#264653). oklch(35.6% 0.034 226.1), rgb(40, 64, 74).
Aa
White text reads best on this color (10.92:1).
About this color
#28404A is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.034 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.021 away. White text reads best on it, at 10.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.92:1 |
| White text | 10.92:1 |
Values
| HEX | #28404A |
| RGB | rgb(40, 64, 74) |
| HSL | hsl(198, 30%, 22%) |
| OKLCH | oklch(35.6% 0.034 226.1) |
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 #28404A | 10.92:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #28404A | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #28404A text on white | 10.92:1 | AAA | Lc 95.2 | Preferred for body text |
| #28404A text on black | 1.92:1 | Fails | Lc -7.4 | 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
#D0DBE0
oklch(88.5% 0.014 226.6)
-
Step 300
300
#B0C4CE
oklch(80.8% 0.026 229.2)
-
Step 400
400
#86A6B5
oklch(70.6% 0.041 228.1)
-
Step 500
500
#6791A2
oklch(63.2% 0.053 225)
-
Step 600
600
#4D7B8D
oklch(55.7% 0.057 224.8)
-
Step 700
700
#3E6778
oklch(49.1% 0.053 226.4)
-
Step 800
800
#345462
oklch(42.7% 0.044 227.5)
-
Step 900
900 (this color)
#28404A
oklch(35.6% 0.034 226.1)
-
Step 950
950
#1B292F
oklch(27.1% 0.022 226.4)
#28404A 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) | #3B3F4B | 0.027 |
| Deuteranopia (no green cones) | #363B4A | 0.024 |
| Tritanopia (no blue cones) | #1A4343 | 0.024 |
| Achromatopsia (no color) | #3D3D3D | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28404A
#28404A
oklch(35.6% 0.034 226.1)
- #4C372D
#4C372D
oklch(35.8% 0.035 46.6)
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 #28404A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.023
- Onyx #343A40 ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.032
- Midnight Green #073B4C ΔE 0.036
- Gunmetal #293241 ΔE 0.045
- Dark Teal #014D4E ΔE 0.046
Use #28404A 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.