#0B4F94
Closest named color: Cobalt (#1E488F). oklch(42.9% 0.13 254.1), rgb(11, 79, 148).
Aa
White text reads best on this color (8.20:1).
About this color
#0B4F94 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.130 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.56:1 |
| White text | 8.20:1 |
Values
| HEX | #0B4F94 |
| RGB | rgb(11, 79, 148) |
| HSL | hsl(210, 86%, 31%) |
| OKLCH | oklch(42.9% 0.13 254.1) |
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 #0B4F94 | 8.20:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #0B4F94 | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #0B4F94 text on white | 8.20:1 | AAA | Lc 87.8 | Fine for body text |
| #0B4F94 text on black | 2.56:1 | Fails | Lc -14.3 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#9FC4F1
oklch(80.9% 0.075 253.6)
-
Step 400
400
#69A4EA
oklch(70.8% 0.12 253.6)
-
Step 500
500
#3D8BE4
oklch(63.1% 0.154 253.9)
-
Step 600
600
#1472D2
oklch(55.5% 0.169 254.3)
-
Step 700
700
#015FB6
oklch(49% 0.157 254.3)
-
Step 800
800 (this color)
#0B4F94
oklch(42.9% 0.13 254.1)
-
Step 900
900
#144275
oklch(37.7% 0.1 253.9)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#0B4F94 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) | #295597 | 0.029 |
| Deuteranopia (no green cones) | #034A93 | 0.015 |
| Tritanopia (no blue cones) | #00606A | 0.097 |
| Achromatopsia (no color) | #4F4F4F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4F94
#0B4F94
oklch(42.9% 0.13 254.1)
- #6D4700
#6D4700
oklch(43% 0.091 74.3)
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 #0B4F94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Dusk Blue #26538D ΔE 0.025
- Light Navy #155084 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.056
- Blueberry #464196 ΔE 0.063
Use #0B4F94 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.