#0B3E72
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.103 253.4), rgb(11, 62, 114).
Aa
White text reads best on this color (10.78:1).
About this color
#0B3E72 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.103 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.019 away. White text reads best on it, at 10.78:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.94:1 |
| White text | 10.78:1 |
Values
| HEX | #0B3E72 |
| RGB | rgb(11, 62, 114) |
| HSL | hsl(210, 82%, 25%) |
| OKLCH | oklch(36.3% 0.103 253.4) |
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 #0B3E72 | 10.78:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #0B3E72 | 1.94:1 | Fails | Lc 9.4 | Not readable |
| #0B3E72 text on white | 10.78:1 | AAA | Lc 94.5 | Preferred for body text |
| #0B3E72 text on black | 1.94:1 | Fails | Lc -8.0 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9EC4F2
oklch(80.9% 0.077 253.5)
-
Step 400
400
#67A4EC
oklch(70.8% 0.124 253.5)
-
Step 500
500
#388BE6
oklch(63.1% 0.159 253.4)
-
Step 600
600
#0473D4
oklch(55.7% 0.172 253.3)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#014E95
oklch(42.6% 0.134 253.7)
-
Step 900
900 (this color)
#0B3E72
oklch(36.3% 0.103 253.4)
-
Step 950
950
#0C2745
oklch(27% 0.065 253.3)
#0B3E72 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) | #234274 | 0.024 |
| Deuteranopia (no green cones) | #0E3971 | 0.015 |
| Tritanopia (no blue cones) | #004A52 | 0.076 |
| Achromatopsia (no color) | #3D3D3D | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3E72
#0B3E72
oklch(36.3% 0.103 253.4)
- #563600
#563600
oklch(36.2% 0.077 72.7)
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 #0B3E72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.019
- Marine Blue #01386A ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.050
- Marine #042E60 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.058
- Cobalt #1E488F ΔE 0.058
- Light Navy #155084 ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.064
Use #0B3E72 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.