#0B315A
Closest named color: Marine (#042E60). oklch(31.2% 0.084 253.7), rgb(11, 49, 90).
Aa
White text reads best on this color (13.11:1).
About this color
#0B315A is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.084 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.016 away. White text reads best on it, at 13.11:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.60:1 |
| White text | 13.11:1 |
Values
| HEX | #0B315A |
| RGB | rgb(11, 49, 90) |
| HSL | hsl(211, 78%, 20%) |
| OKLCH | oklch(31.2% 0.084 253.7) |
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 #0B315A | 13.11:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #0B315A | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #0B315A text on white | 13.11:1 | AAA | Lc 99.1 | Preferred for body text |
| #0B315A text on black | 1.60:1 | 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
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DDEBFD
oklch(93.5% 0.029 254.7)
-
Step 200
200
#C0DCFE
oklch(88.5% 0.056 253.4)
-
Step 300
300
#94C4FF
oklch(80.8% 0.098 254)
-
Step 400
400
#53A3FF
oklch(70.7% 0.157 253.6)
-
Step 500
500
#0088FD
oklch(63.1% 0.199 253.8)
-
Step 600
600
#0072D6
oklch(55.6% 0.176 253.8)
-
Step 700
700
#0060B5
oklch(49.2% 0.155 253.6)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900
#00417E
oklch(37.7% 0.118 253.6)
-
Step 950
950 (this color)
#0B315A
oklch(31.2% 0.084 253.7)
#0B315A 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) | #1C345C | 0.020 |
| Deuteranopia (no green cones) | #0E2D59 | 0.012 |
| Tritanopia (no blue cones) | #003B41 | 0.063 |
| Achromatopsia (no color) | #303030 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B315A
#0B315A
oklch(31.2% 0.084 253.7)
- #442B00
#442B00
oklch(31.2% 0.066 74.8)
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 #0B315A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.024
- Marine Blue #01386A ΔE 0.033
- Midnight Green #073B4C ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.054
- Gunmetal #293241 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.061
Use #0B315A 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.