#0D304B
Closest named color: Prussian Blue (#1D3557). oklch(29.9% 0.063 245.7), rgb(13, 48, 75).
Aa
White text reads best on this color (13.62:1).
About this color
#0D304B is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.063 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.032 away. White text reads best on it, at 13.62:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.54:1 |
| White text | 13.62:1 |
Values
| HEX | #0D304B |
| RGB | rgb(13, 48, 75) |
| HSL | hsl(206, 70%, 17%) |
| OKLCH | oklch(29.9% 0.063 245.7) |
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 #0D304B | 13.62:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #0D304B | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #0D304B text on white | 13.62:1 | AAA | Lc 99.9 | Preferred for body text |
| #0D304B text on black | 1.54:1 | 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 950.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#99C6EE
oklch(80.9% 0.074 245.7)
-
Step 400
400
#5CA7E6
oklch(70.6% 0.119 245.9)
-
Step 500
500
#1B90DF
oklch(63.2% 0.152 245.5)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950 (this color)
#0D304B
oklch(29.9% 0.063 245.7)
#0D304B 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) | #24314C | 0.027 |
| Deuteranopia (no green cones) | #1B2B4A | 0.020 |
| Tritanopia (no blue cones) | #00373A | 0.046 |
| Achromatopsia (no color) | #2E2E2E | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D304B
#0D304B
oklch(29.9% 0.063 245.7)
- #432603
#432603
oklch(30% 0.064 65.5)
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 #0D304B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.032
- Midnight Green #073B4C ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.040
- Marine #042E60 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark #1B2431 ΔE 0.055
Use #0D304B 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.