#0D3759
Closest named color: Prussian Blue (#1D3557). oklch(32.7% 0.075 247.5), rgb(13, 55, 89).
Aa
White text reads best on this color (12.29:1).
About this color
#0D3759 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.075 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.014 away. White text reads best on it, at 12.29:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.29:1 |
Values
| HEX | #0D3759 |
| RGB | rgb(13, 55, 89) |
| HSL | hsl(207, 75%, 20%) |
| OKLCH | oklch(32.7% 0.075 247.5) |
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 #0D3759 | 12.29:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #0D3759 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #0D3759 text on white | 12.29:1 | AAA | Lc 97.7 | Preferred for body text |
| #0D3759 text on black | 1.70:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E4
oklch(81% 0.057 246.9)
-
Step 400
400
#72A6D6
oklch(70.7% 0.09 247.2)
-
Step 500
500
#4A8FCC
oklch(63.2% 0.116 247.5)
-
Step 600
600
#2978B8
oklch(55.6% 0.125 247.2)
-
Step 700
700
#1A649F
oklch(49% 0.117 247.8)
-
Step 800
800
#195281
oklch(42.7% 0.097 247.7)
-
Step 900
900 (this color)
#0D3759
oklch(32.7% 0.075 247.5)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#0D3759 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) | #27395A | 0.028 |
| Deuteranopia (no green cones) | #1C3258 | 0.019 |
| Tritanopia (no blue cones) | #003F43 | 0.054 |
| Achromatopsia (no color) | #353535 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D3759
#0D3759
oklch(32.7% 0.075 247.5)
- #4D2C00
#4D2C00
oklch(32.8% 0.073 66.8)
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 #0D3759, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.014
- Marine Blue #01386A ΔE 0.030
- Midnight Green #073B4C ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.032
- Marine #042E60 ΔE 0.034
- Gunmetal #293241 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.059
Use #0D3759 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.