#0B4AA0
Closest named color: Cobalt (#1E488F). oklch(42.7% 0.152 258.6), rgb(11, 74, 160).
Aa
White text reads best on this color (8.39:1).
About this color
#0B4AA0 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.152 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #0B4AA0 |
| RGB | rgb(11, 74, 160) |
| HSL | hsl(215, 87%, 34%) |
| OKLCH | oklch(42.7% 0.152 258.6) |
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 #0B4AA0 | 8.39:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #0B4AA0 | 2.50:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #0B4AA0 text on white | 8.39:1 | AAA | Lc 88.3 | Fine for body text |
| #0B4AA0 text on black | 2.50:1 | Fails | Lc -13.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9EC2FA
oklch(80.8% 0.089 259.1)
-
Step 400
400
#67A1F8
oklch(70.7% 0.142 258.3)
-
Step 500
500
#3C86F5
oklch(63.1% 0.182 258.6)
-
Step 600
600
#156CE4
oklch(55.5% 0.198 258.7)
-
Step 700
700
#045AC6
oklch(49.2% 0.183 258.5)
-
Step 800
800 (this color)
#0B4AA0
oklch(42.7% 0.152 258.6)
-
Step 900
900
#133F7F
oklch(37.7% 0.119 258.5)
-
Step 950
950
#0D254A
oklch(26.9% 0.075 258.9)
#0B4AA0 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) | #0254A3 | 0.027 |
| Deuteranopia (no green cones) | #00479E | 0.010 |
| Tritanopia (no blue cones) | #005F6D | 0.115 |
| Achromatopsia (no color) | #4D4D4D | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4AA0
#0B4AA0
oklch(42.7% 0.152 258.6)
- #694800
#694800
oklch(42.7% 0.089 78.7)
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 #0B4AA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Sapphire #2138AB ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
- Light Navy #155084 ΔE 0.052
- Blueberry #464196 ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.065
- Blue Blue #2242C7 ΔE 0.066
Use #0B4AA0 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.