#28355C
Closest named color: Prussian Blue (#1D3557). oklch(33.8% 0.071 268.5), rgb(40, 53, 92).
Aa
White text reads best on this color (11.97:1).
About this color
#28355C is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.071 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 11.97:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.75:1 |
| White text | 11.97:1 |
Values
| HEX | #28355C |
| RGB | rgb(40, 53, 92) |
| HSL | hsl(225, 39%, 26%) |
| OKLCH | oklch(33.8% 0.071 268.5) |
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 #28355C | 11.97:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #28355C | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #28355C text on white | 11.97:1 | AAA | Lc 97.3 | Preferred for body text |
| #28355C text on black | 1.75:1 | Fails | Lc 0.0 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9ED
oklch(88.5% 0.029 268.3)
-
Step 300
300
#B2C0E4
oklch(80.9% 0.053 268.5)
-
Step 400
400
#8A9FD6
oklch(70.7% 0.084 268.1)
-
Step 500
500
#6E86CC
oklch(63.1% 0.109 268.8)
-
Step 600
600
#566FB8
oklch(55.6% 0.117 268.2)
-
Step 700
700
#475C9F
oklch(49.1% 0.11 269)
-
Step 800
800
#3A4C81
oklch(42.8% 0.091 268.2)
-
Step 900
900 (this color)
#28355C
oklch(33.8% 0.071 268.5)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#28355C 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) | #25395E | 0.012 |
| Deuteranopia (no green cones) | #1F345B | 0.013 |
| Tritanopia (no blue cones) | #0F3D44 | 0.062 |
| Achromatopsia (no color) | #373737 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28355C
#28355C
oklch(33.8% 0.071 268.5)
- #463500
#463500
oklch(33.8% 0.069 88.8)
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 #28355C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.039
- Marine Blue #01386A ΔE 0.039
- Marine #042E60 ΔE 0.046
- Gunmetal #293241 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Midnight Green #073B4C ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.055
Use #28355C 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.