#0B3261
Closest named color: Marine (#042E60). oklch(32% 0.094 255.8), rgb(11, 50, 97).
Aa
White text reads best on this color (12.78:1).
About this color
#0B3261 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.094 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.014 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #0B3261 |
| RGB | rgb(11, 50, 97) |
| HSL | hsl(213, 80%, 21%) |
| OKLCH | oklch(32% 0.094 255.8) |
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 #0B3261 | 12.78:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #0B3261 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #0B3261 text on white | 12.78:1 | AAA | Lc 98.5 | Preferred for body text |
| #0B3261 text on black | 1.64:1 | 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
#DDEBFF
oklch(93.6% 0.031 257.2)
-
Step 200
200
#C1DBFF
oklch(88.4% 0.057 256.6)
-
Step 300
300
#97C4FF
oklch(81% 0.097 255.4)
-
Step 400
400
#5AA2FF
oklch(70.7% 0.155 255.7)
-
Step 500
500
#1B86FF
oklch(63% 0.202 255.9)
-
Step 600
600
#0070DE
oklch(55.7% 0.188 255.7)
-
Step 700
700
#005EBC
oklch(49.2% 0.166 255.7)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#003F83
oklch(37.6% 0.128 255.9)
-
Step 950
950 (this color)
#0B3261
oklch(32% 0.094 255.8)
#0B3261 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) | #193663 | 0.019 |
| Deuteranopia (no green cones) | #052F60 | 0.011 |
| Tritanopia (no blue cones) | #003D44 | 0.071 |
| Achromatopsia (no color) | #323232 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3261
#0B3261
oklch(32% 0.094 255.8)
- #462D00
#462D00
oklch(31.9% 0.067 75.8)
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 #0B3261, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.014
- Marine Blue #01386A ΔE 0.022
- Prussian Blue #1D3557 ΔE 0.027
- Midnight Green #073B4C ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.063
- Twilight Blue #0A437A ΔE 0.063
- Gunmetal #293241 ΔE 0.064
Use #0B3261 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.