#28327B
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.124 272.5), rgb(40, 50, 123).
Aa
White text reads best on this color (11.45:1).
About this color
#28327B is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.124 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 11.45:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.83:1 |
| White text | 11.45:1 |
Values
| HEX | #28327B |
| RGB | rgb(40, 50, 123) |
| HSL | hsl(233, 51%, 32%) |
| OKLCH | oklch(35.5% 0.124 272.5) |
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 #28327B | 11.45:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #28327B | 1.83:1 | Fails | Lc 7.9 | Not readable |
| #28327B text on white | 11.45:1 | AAA | Lc 96.0 | Preferred for body text |
| #28327B text on black | 1.83:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ACBDFD
oklch(80.9% 0.093 272.7)
-
Step 400
400
#8298FC
oklch(70.6% 0.148 272.7)
-
Step 500
500
#657BFA
oklch(63.1% 0.189 272.4)
-
Step 600
600
#4F60E9
oklch(55.6% 0.206 272.4)
-
Step 700
700
#414ECB
oklch(49.2% 0.192 272.6)
-
Step 800
800
#3541A4
oklch(42.8% 0.159 272.5)
-
Step 900
900 (this color)
#28327B
oklch(35.5% 0.124 272.5)
-
Step 950
950
#1A224C
oklch(27.1% 0.078 272.1)
#28327B 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) | #003D7D | 0.039 |
| Deuteranopia (no green cones) | #00367A | 0.033 |
| Tritanopia (no blue cones) | #004451 | 0.104 |
| Achromatopsia (no color) | #3A3A3A | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28327B
#28327B
oklch(35.5% 0.124 272.5)
- #493A00
#493A00
oklch(35.4% 0.073 92.5)
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 #28327B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Twilight Blue #0A437A ΔE 0.050
- Marine #042E60 ΔE 0.062
- Cobalt #1E488F ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
- Midnight Blue #191970 ΔE 0.070
- Blueberry #464196 ΔE 0.077
Use #28327B 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.