#0F419B
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.156 261.2), rgb(15, 65, 155).
Aa
White text reads best on this color (9.33:1).
About this color
#0F419B is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.156 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #0F419B |
| RGB | rgb(15, 65, 155) |
| HSL | hsl(219, 82%, 33%) |
| OKLCH | oklch(40.4% 0.156 261.2) |
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 #0F419B | 9.33:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #0F419B | 2.24:1 | Fails | Lc 13.1 | Not readable |
| #0F419B text on white | 9.33:1 | AAA | Lc 90.9 | Preferred for body text |
| #0F419B text on black | 2.24:1 | 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
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C1FC
oklch(80.8% 0.091 261.8)
-
Step 400
400
#6C9FFB
oklch(70.7% 0.146 261.4)
-
Step 500
500
#4484F8
oklch(63.2% 0.186 261.1)
-
Step 600
600
#256AE7
oklch(55.7% 0.202 261.2)
-
Step 700
700
#1857C9
oklch(49.1% 0.188 261.3)
-
Step 800
800 (this color)
#0F419B
oklch(40.4% 0.156 261.2)
-
Step 900
900
#193D81
oklch(37.6% 0.122 261.6)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#0F419B 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) | #004D9E | 0.031 |
| Deuteranopia (no green cones) | #004199 | 0.007 |
| Tritanopia (no blue cones) | #005867 | 0.120 |
| Achromatopsia (no color) | #474747 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F419B
#0F419B
oklch(40.4% 0.156 261.2)
- #5F4300
#5F4300
oklch(40.3% 0.083 81.5)
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 #0F419B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Sapphire #2138AB ΔE 0.034
- Twilight Blue #0A437A ΔE 0.056
- Light Navy #155084 ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Dusk Blue #26538D ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.068
- Deep Sea Blue #015482 ΔE 0.072
Use #0F419B 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.