#0D3A70
Closest named color: Marine Blue (#01386A). oklch(35.2% 0.105 255.8), rgb(13, 58, 112).
Aa
White text reads best on this color (11.31:1).
About this color
#0D3A70 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.105 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 11.31:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.31:1 |
Values
| HEX | #0D3A70 |
| RGB | rgb(13, 58, 112) |
| HSL | hsl(213, 79%, 25%) |
| OKLCH | oklch(35.2% 0.105 255.8) |
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 #0D3A70 | 11.31:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #0D3A70 | 1.85:1 | Fails | Lc 8.2 | Not readable |
| #0D3A70 text on white | 11.31:1 | AAA | Lc 95.7 | Preferred for body text |
| #0D3A70 text on black | 1.85:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#9FC3F3
oklch(80.8% 0.079 255.7)
-
Step 400
400
#6AA3EE
oklch(70.8% 0.126 255.7)
-
Step 500
500
#3F89E8
oklch(63% 0.161 256)
-
Step 600
600
#1971D6
oklch(55.6% 0.174 255.8)
-
Step 700
700
#075EBA
oklch(49.1% 0.163 255.8)
-
Step 800
800
#0D4D96
oklch(42.6% 0.134 255.8)
-
Step 900
900 (this color)
#0D3A70
oklch(35.2% 0.105 255.8)
-
Step 950
950
#0E2646
oklch(26.9% 0.067 256.5)
#0D3A70 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) | #1D3F72 | 0.022 |
| Deuteranopia (no green cones) | #03366F | 0.014 |
| Tritanopia (no blue cones) | #00474F | 0.079 |
| Achromatopsia (no color) | #3A3A3A | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D3A70
#0D3A70
oklch(35.2% 0.105 255.8)
- #513500
#513500
oklch(35.3% 0.074 76.2)
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 #0D3A70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Twilight Blue #0A437A ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.044
- Marine #042E60 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.065
- Midnight Green #073B4C ΔE 0.066
- Cobalt #1E488F ΔE 0.067
Use #0D3A70 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.