#0B3A69
Closest named color: Marine Blue (#01386A). oklch(34.6% 0.095 252.8), rgb(11, 58, 105).
Aa
White text reads best on this color (11.51:1).
About this color
#0B3A69 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.095 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.009 away. White text reads best on it, at 11.51:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.51:1 |
Values
| HEX | #0B3A69 |
| RGB | rgb(11, 58, 105) |
| HSL | hsl(210, 81%, 23%) |
| OKLCH | oklch(34.6% 0.095 252.8) |
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 #0B3A69 | 11.51:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #0B3A69 | 1.82:1 | Fails | Lc 7.8 | Not readable |
| #0B3A69 text on white | 11.51:1 | AAA | Lc 96.1 | Preferred for body text |
| #0B3A69 text on black | 1.82:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4EE
oklch(80.9% 0.071 252.6)
-
Step 400
400
#6BA4E6
oklch(70.7% 0.114 253)
-
Step 500
500
#408CDF
oklch(63.2% 0.146 252.9)
-
Step 600
600
#1874CC
oklch(55.6% 0.158 252.7)
-
Step 700
700
#0661B1
oklch(49.2% 0.147 252.7)
-
Step 800
800
#0D4F8F
oklch(42.6% 0.122 253)
-
Step 900
900 (this color)
#0B3A69
oklch(34.6% 0.095 252.8)
-
Step 950
950
#0E2743
oklch(26.9% 0.061 253.2)
#0B3A69 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) | #223E6B | 0.025 |
| Deuteranopia (no green cones) | #113568 | 0.015 |
| Tritanopia (no blue cones) | #00454C | 0.070 |
| Achromatopsia (no color) | #393939 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3A69
#0B3A69
oklch(34.6% 0.095 252.8)
- #503200
#503200
oklch(34.5% 0.074 72.8)
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 #0B3A69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.009
- Prussian Blue #1D3557 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.037
- Marine #042E60 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.052
- Midnight Green #073B4C ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.059
- Charcoal #264653 ΔE 0.066
Use #0B3A69 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.