#28315E
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.08 272.8), rgb(40, 49, 94).
Aa
White text reads best on this color (12.41:1).
About this color
#28315E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.080 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 12.41:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.41:1 |
Values
| HEX | #28315E |
| RGB | rgb(40, 49, 94) |
| HSL | hsl(230, 40%, 26%) |
| OKLCH | oklch(33% 0.08 272.8) |
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 #28315E | 12.41:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #28315E | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #28315E text on white | 12.41:1 | AAA | Lc 98.1 | Preferred for body text |
| #28315E text on black | 1.69:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B3BFE8
oklch(80.9% 0.06 272.2)
-
Step 400
400
#8C9DDD
oklch(70.7% 0.096 272.3)
-
Step 500
500
#7183D3
oklch(63.1% 0.122 272.8)
-
Step 600
600
#5A6BC1
oklch(55.6% 0.134 272.9)
-
Step 700
700
#4A59A6
oklch(49.1% 0.124 272.8)
-
Step 800
800
#3D4987
oklch(42.7% 0.103 273)
-
Step 900
900 (this color)
#28315E
oklch(33% 0.08 272.8)
-
Step 950
950
#1E243F
oklch(26.9% 0.051 273)
#28315E 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) | #1D3760 | 0.021 |
| Deuteranopia (no green cones) | #17325D | 0.021 |
| Tritanopia (no blue cones) | #0E3B43 | 0.071 |
| Achromatopsia (no color) | #343434 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28315E
#28315E
oklch(33% 0.08 272.8)
- #413400
#413400
oklch(33% 0.068 93.5)
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 #28315E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Marine #042E60 ΔE 0.039
- Marine Blue #01386A ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.050
- Gunmetal #293241 ΔE 0.053
- Midnight Green #073B4C ΔE 0.059
- Twilight Blue #0A437A ΔE 0.067
Use #28315E 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.