#28316D
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.104 273.2), rgb(40, 49, 109).
Aa
White text reads best on this color (11.99:1).
About this color
#28316D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.104 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.037 away. White text reads best on it, at 11.99:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.99:1 |
Values
| HEX | #28316D |
| RGB | rgb(40, 49, 109) |
| HSL | hsl(232, 46%, 29%) |
| OKLCH | oklch(34.1% 0.104 273.2) |
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 #28316D | 11.99:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #28316D | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #28316D text on white | 11.99:1 | AAA | Lc 97.2 | Preferred for body text |
| #28316D 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#B0BEF4
oklch(81% 0.078 273.3)
-
Step 400
400
#879AEE
oklch(70.6% 0.125 273.1)
-
Step 500
500
#6B7FE8
oklch(63.1% 0.158 272.9)
-
Step 600
600
#5565D7
oklch(55.5% 0.174 273.3)
-
Step 700
700
#4653BA
oklch(49% 0.161 273.5)
-
Step 800
800
#394597
oklch(42.7% 0.134 273.1)
-
Step 900
900 (this color)
#28316D
oklch(34.1% 0.104 273.2)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#28316D 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) | #0E3A6F | 0.033 |
| Deuteranopia (no green cones) | #00346C | 0.035 |
| Tritanopia (no blue cones) | #003F4A | 0.090 |
| Achromatopsia (no color) | #363636 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28316D
#28316D
oklch(34.1% 0.104 273.2)
- #453700
#453700
oklch(34.2% 0.07 93)
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 #28316D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.045
- Marine #042E60 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.055
- Midnight Blue #191970 ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.078
Use #28316D 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.