#0B4EAD
Closest named color: Cobalt (#1E488F). oklch(44.7% 0.165 259.2), rgb(11, 78, 173).
Aa
White text reads best on this color (7.75:1).
About this color
#0B4EAD is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.165 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.050 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #0B4EAD |
| RGB | rgb(11, 78, 173) |
| HSL | hsl(215, 88%, 36%) |
| OKLCH | oklch(44.7% 0.165 259.2) |
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 #0B4EAD | 7.75:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #0B4EAD | 2.70:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #0B4EAD text on white | 7.75:1 | AAA | Lc 86.2 | Fine for body text |
| #0B4EAD text on black | 2.70:1 | Fails | Lc -15.8 | Dividers and decoration only |
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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFD
oklch(88.5% 0.053 258)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500
#3684FE
oklch(63.1% 0.197 259.3)
-
Step 600
600
#066AED
oklch(55.7% 0.214 259.1)
-
Step 700
700
#0058CA
oklch(49.1% 0.191 259.1)
-
Step 800
800 (this color)
#0B4EAD
oklch(44.7% 0.165 259.2)
-
Step 900
900
#0F3E84
oklch(37.8% 0.128 259)
-
Step 950
950
#0B254D
oklch(27% 0.081 259)
#0B4EAD 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) | #005AB0 | 0.032 |
| Deuteranopia (no green cones) | #004CAB | 0.008 |
| Tritanopia (no blue cones) | #006676 | 0.125 |
| Achromatopsia (no color) | #525252 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B4EAD
#0B4EAD
oklch(44.7% 0.165 259.2)
- #6F4D00
#6F4D00
oklch(44.6% 0.093 79.4)
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 #0B4EAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.050
- Blue Blue #2242C7 ΔE 0.050
- Sapphire #2138AB ΔE 0.051
- Dusk Blue #26538D ΔE 0.057
- Blueberry #464196 ΔE 0.068
- Light Navy #155084 ΔE 0.068
- Denim Blue #3B5B92 ΔE 0.073
- Majorelle Blue #3F37C9 ΔE 0.075
Use #0B4EAD 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.