#0B419C
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.158 260.8), rgb(11, 65, 156).
Aa
White text reads best on this color (9.33:1).
About this color
#0B419C is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.158 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #0B419C |
| RGB | rgb(11, 65, 156) |
| HSL | hsl(218, 87%, 33%) |
| OKLCH | oklch(40.4% 0.158 260.8) |
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 #0B419C | 9.33:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #0B419C | 2.25:1 | Fails | Lc 13.1 | Not readable |
| #0B419C text on white | 9.33:1 | AAA | Lc 90.8 | Preferred for body text |
| #0B419C text on black | 2.25:1 | Fails | Lc -11.5 | 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
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC2FD
oklch(81% 0.092 260.7)
-
Step 400
400
#6A9FFC
oklch(70.7% 0.148 261)
-
Step 500
500
#4184F9
oklch(63.1% 0.188 260.7)
-
Step 600
600
#206AE9
oklch(55.7% 0.205 260.7)
-
Step 700
700
#1357CA
oklch(49.1% 0.19 260.8)
-
Step 800
800 (this color)
#0B419C
oklch(40.4% 0.158 260.8)
-
Step 900
900
#173E82
oklch(37.9% 0.123 260.7)
-
Step 950
950
#0E254C
oklch(27.1% 0.078 260.3)
#0B419C 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) | #004D9F | 0.031 |
| Deuteranopia (no green cones) | #00419A | 0.006 |
| Tritanopia (no blue cones) | #005868 | 0.120 |
| Achromatopsia (no color) | #474747 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B419C
#0B419C
oklch(40.4% 0.158 260.8)
- #604300
#604300
oklch(40.5% 0.084 80.6)
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 #0B419C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.034
- Twilight Blue #0A437A ΔE 0.058
- Light Navy #155084 ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Dusk Blue #26538D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.071
- Blue Blue #2242C7 ΔE 0.072
Use #0B419C 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.