#28455F
Closest named color: Dark Grey Blue (#29465B). oklch(38% 0.057 247), rgb(40, 69, 95).
Aa
White text reads best on this color (9.96:1).
About this color
#28455F is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.057 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.009 away. White text reads best on it, at 9.96:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #28455F |
| RGB | rgb(40, 69, 95) |
| HSL | hsl(208, 41%, 26%) |
| OKLCH | oklch(38% 0.057 247) |
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 #28455F | 9.96:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #28455F | 2.10:1 | Fails | Lc 10.9 | Not readable |
| #28455F text on white | 9.96:1 | AAA | Lc 93.0 | Preferred for body text |
| #28455F text on black | 2.10:1 | Fails | Lc -9.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DB
oklch(80.9% 0.042 246.1)
-
Step 400
400
#7EA5C9
oklch(70.7% 0.068 246.8)
-
Step 500
500
#5C8EBC
oklch(63% 0.088 247.4)
-
Step 600
600
#4178A8
oklch(55.6% 0.095 246.9)
-
Step 700
700
#336590
oklch(49.2% 0.088 246.7)
-
Step 800
800
#2B5275
oklch(42.7% 0.073 247.5)
-
Step 900
900 (this color)
#28455F
oklch(38% 0.057 247)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#28455F 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) | #3A4660 | 0.024 |
| Deuteranopia (no green cones) | #33405E | 0.019 |
| Tritanopia (no blue cones) | #054B4E | 0.048 |
| Achromatopsia (no color) | #434343 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28455F
#28455F
oklch(38% 0.057 247)
- #573C1F
#573C1F
oklch(38% 0.057 66.5)
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 #28455F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.009
- Charcoal #264653 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.052
- Dark Teal #014D4E ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.054
Use #28455F 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.