#28335B
Closest named color: Prussian Blue (#1D3557). oklch(33.2% 0.072 270.5), rgb(40, 51, 91).
Aa
White text reads best on this color (12.24:1).
About this color
#28335B is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.072 and its hue 270°. 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 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #28335B |
| RGB | rgb(40, 51, 91) |
| HSL | hsl(227, 39%, 26%) |
| OKLCH | oklch(33.2% 0.072 270.5) |
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 #28335B | 12.24:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #28335B | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #28335B text on white | 12.24:1 | AAA | Lc 97.8 | Preferred for body text |
| #28335B text on black | 1.71:1 | 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
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B3C0E5
oklch(81% 0.054 269.9)
-
Step 400
400
#8C9ED7
oklch(70.7% 0.086 270.6)
-
Step 500
500
#7085CD
oklch(63.1% 0.111 270.6)
-
Step 600
600
#596EB9
oklch(55.6% 0.119 270.4)
-
Step 700
700
#495BA0
oklch(49% 0.113 270.8)
-
Step 800
800
#3C4B82
oklch(42.8% 0.093 270.6)
-
Step 900
900 (this color)
#28335B
oklch(33.2% 0.072 270.5)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#28335B 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) | #23375D | 0.013 |
| Deuteranopia (no green cones) | #1D335A | 0.015 |
| Tritanopia (no blue cones) | #113C42 | 0.065 |
| Achromatopsia (no color) | #353535 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28335B
#28335B
oklch(33.2% 0.072 270.5)
- #433400
#433400
oklch(33.2% 0.068 90.9)
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 #28335B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Marine Blue #01386A ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.042
- Marine #042E60 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.046
- Midnight Green #073B4C ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.061
Use #28335B 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.