#0D375B
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.078 248.9), rgb(13, 55, 91).
Aa
White text reads best on this color (12.24:1).
About this color
#0D375B is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.078 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #0D375B |
| RGB | rgb(13, 55, 91) |
| HSL | hsl(208, 75%, 20%) |
| OKLCH | oklch(32.9% 0.078 248.9) |
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 #0D375B | 12.24:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #0D375B | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #0D375B text on white | 12.24:1 | AAA | Lc 97.6 | Preferred for body text |
| #0D375B text on black | 1.71:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEE
oklch(88.4% 0.033 249.6)
-
Step 300
300
#A4C4E5
oklch(80.8% 0.058 249.3)
-
Step 400
400
#71A5D9
oklch(70.6% 0.095 249.3)
-
Step 500
500
#498ECE
oklch(63% 0.12 248.7)
-
Step 600
600
#2877BB
oklch(55.6% 0.13 248.7)
-
Step 700
700
#1A64A2
oklch(49.2% 0.121 248.9)
-
Step 800
800
#195283
oklch(42.8% 0.1 248.7)
-
Step 900
900 (this color)
#0D375B
oklch(32.9% 0.078 248.9)
-
Step 950
950
#11283D
oklch(26.9% 0.049 248.1)
#0D375B 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) | #26395C | 0.027 |
| Deuteranopia (no green cones) | #1A325A | 0.017 |
| Tritanopia (no blue cones) | #004044 | 0.058 |
| Achromatopsia (no color) | #353535 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D375B
#0D375B
oklch(32.9% 0.078 248.9)
- #4C2D00
#4C2D00
oklch(32.8% 0.071 69.3)
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 #0D375B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Marine Blue #01386A ΔE 0.026
- Marine #042E60 ΔE 0.033
- Midnight Green #073B4C ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.035
- Gunmetal #293241 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.060
Use #0D375B 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.