#303372
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.106 277.4), rgb(48, 51, 114).
Aa
White text reads best on this color (11.39:1).
About this color
#303372 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.106 and its hue 277°. 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 11.39:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.84:1 |
| White text | 11.39:1 |
Values
| HEX | #303372 |
| RGB | rgb(48, 51, 114) |
| HSL | hsl(237, 41%, 32%) |
| OKLCH | oklch(35.5% 0.106 277.4) |
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 #303372 | 11.39:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #303372 | 1.84:1 | Fails | Lc 7.8 | Not readable |
| #303372 text on white | 11.39:1 | AAA | Lc 96.0 | Preferred for body text |
| #303372 text on black | 1.84:1 | 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
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F7
oklch(88.5% 0.044 277.1)
-
Step 300
300
#B3BCF4
oklch(80.8% 0.08 277.4)
-
Step 400
400
#8D98EF
oklch(70.7% 0.127 277.1)
-
Step 500
500
#737CEA
oklch(63.2% 0.163 277.1)
-
Step 600
600
#5E62D8
oklch(55.6% 0.177 277.5)
-
Step 700
700
#4E50BB
oklch(49.1% 0.165 277.6)
-
Step 800
800
#3F4298
oklch(42.6% 0.138 277.3)
-
Step 900
900 (this color)
#303372
oklch(35.5% 0.106 277.4)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#303372 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) | #0F3D74 | 0.041 |
| Deuteranopia (no green cones) | #033771 | 0.043 |
| Tritanopia (no blue cones) | #0E414D | 0.093 |
| Achromatopsia (no color) | #3A3A3A | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303372
#303372
oklch(35.5% 0.106 277.4)
- #473C00
#473C00
oklch(35.7% 0.074 97.5)
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 #303372, 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 0.053
- Prussian Blue #1D3557 ΔE 0.056
- Marine #042E60 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.064
- Cobalt #1E488F ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.077
- Midnight Blue #191970 ΔE 0.077
Use #303372 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.