#0B458D
Closest named color: Cobalt (#1E488F). oklch(40% 0.132 257.1), rgb(11, 69, 141).
Aa
White text reads best on this color (9.33:1).
About this color
#0B458D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.132 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #0B458D |
| RGB | rgb(11, 69, 141) |
| HSL | hsl(213, 86%, 30%) |
| OKLCH | oklch(40% 0.132 257.1) |
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 #0B458D | 9.33:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #0B458D | 2.25:1 | Fails | Lc 13.0 | Not readable |
| #0B458D text on white | 9.33:1 | AAA | Lc 91.0 | Preferred for body text |
| #0B458D text on black | 2.25:1 | Fails | Lc -11.4 | 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 900.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C3DBFE
oklch(88.5% 0.055 257.7)
-
Step 300
300
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400
#5EA1FF
oklch(70.7% 0.154 257.1)
-
Step 500
500
#2785FF
oklch(63% 0.201 257.2)
-
Step 600
600
#006EE4
oklch(55.7% 0.198 257)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900 (this color)
#0B458D
oklch(40% 0.132 257.1)
-
Step 950
950
#06254E
oklch(26.9% 0.084 257.1)
#0B458D 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) | #174D90 | 0.025 |
| Deuteranopia (no green cones) | #00418C | 0.013 |
| Tritanopia (no blue cones) | #005762 | 0.101 |
| Achromatopsia (no color) | #474747 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B458D
#0B458D
oklch(40% 0.132 257.1)
- #614100
#614100
oklch(40.2% 0.084 77.1)
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 #0B458D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.039
- Dusk Blue #26538D ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.050
- Sapphire #2138AB ΔE 0.060
- Blueberry #464196 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.066
Use #0B458D 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.