#0B4891
Closest named color: Cobalt (#1E488F). oklch(41.1% 0.134 256.6), rgb(11, 72, 145).
Aa
White text reads best on this color (8.93:1).
About this color
#0B4891 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.134 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 8.93:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.35:1 |
| White text | 8.93:1 |
Values
| HEX | #0B4891 |
| RGB | rgb(11, 72, 145) |
| HSL | hsl(213, 86%, 31%) |
| OKLCH | oklch(41.1% 0.134 256.6) |
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 #0B4891 | 8.93:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #0B4891 | 2.35:1 | Fails | Lc 14.1 | Not readable |
| #0B4891 text on white | 8.93:1 | AAA | Lc 89.9 | Fine for body text |
| #0B4891 text on black | 2.35:1 | Fails | Lc -12.4 | 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 800.
-
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
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6CA2EE
oklch(70.7% 0.126 257.1)
-
Step 500
500
#4289E8
oklch(63.1% 0.16 256.6)
-
Step 600
600
#1E70D6
oklch(55.5% 0.174 256.7)
-
Step 700
700
#0F5DBA
oklch(49% 0.163 256.8)
-
Step 800
800 (this color)
#0B4891
oklch(41.1% 0.134 256.6)
-
Step 900
900
#174178
oklch(37.8% 0.105 256.6)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#0B4891 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) | #1B5094 | 0.026 |
| Deuteranopia (no green cones) | #004490 | 0.013 |
| Tritanopia (no blue cones) | #005A65 | 0.102 |
| Achromatopsia (no color) | #494949 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4891
#0B4891
oklch(41.1% 0.134 256.6)
- #644300
#644300
oklch(41% 0.086 77)
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 #0B4891, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Light Navy #155084 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.040
- Dusk Blue #26538D ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.046
- Sapphire #2138AB ΔE 0.059
- Blueberry #464196 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.066
Use #0B4891 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.