#304572
Closest named color: Twilight Blue (#0A437A). oklch(39.6% 0.081 264.1), rgb(48, 69, 114).
Aa
White text reads best on this color (9.45:1).
About this color
#304572 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.081 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.036 away. White text reads best on it, at 9.45:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.45:1 |
Values
| HEX | #304572 |
| RGB | rgb(48, 69, 114) |
| HSL | hsl(221, 41%, 32%) |
| OKLCH | oklch(39.6% 0.081 264.1) |
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 #304572 | 9.45:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #304572 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #304572 text on white | 9.45:1 | AAA | Lc 91.7 | Preferred for body text |
| #304572 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F0
oklch(88.4% 0.034 265.2)
-
Step 300
300
#ADC1E9
oklch(80.9% 0.061 264.2)
-
Step 400
400
#82A0DE
oklch(70.7% 0.097 264.2)
-
Step 500
500
#6387D4
oklch(63.1% 0.123 264.2)
-
Step 600
600
#4A6FC2
oklch(55.5% 0.136 264.3)
-
Step 700
700
#3B5DA7
oklch(49.1% 0.125 263.8)
-
Step 800
800
#314C87
oklch(42.6% 0.103 264)
-
Step 900
900 (this color)
#304572
oklch(39.6% 0.081 264.1)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#304572 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) | #334974 | 0.013 |
| Deuteranopia (no green cones) | #2B4371 | 0.009 |
| Tritanopia (no blue cones) | #084F56 | 0.073 |
| Achromatopsia (no color) | #464646 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304572
#304572
oklch(39.6% 0.081 264.1)
- #5B4200
#5B4200
oklch(39.6% 0.081 84.1)
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 #304572, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.036
- Light Navy #155084 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.043
- Cobalt #1E488F ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.051
- Dusk Blue #26538D ΔE 0.055
- Charcoal #264653 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.061
Use #304572 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.