#0F1F4B
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.085 265.6), rgb(15, 31, 75).
Aa
White text reads best on this color (15.93:1).
About this color
#0F1F4B is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.085 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 15.93:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.93:1 |
Values
| HEX | #0F1F4B |
| RGB | rgb(15, 31, 75) |
| HSL | hsl(224, 67%, 18%) |
| OKLCH | oklch(25.6% 0.085 265.6) |
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 #0F1F4B | 15.93:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #0F1F4B | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #0F1F4B text on white | 15.93:1 | AAA | Lc 102.6 | Preferred for body text |
| #0F1F4B text on black | 1.31:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#3462F3
oklch(55.6% 0.223 265.8)
-
Step 700
700
#2750D3
oklch(49% 0.206 265.6)
-
Step 800
800
#2143AB
oklch(42.8% 0.171 265.6)
-
Step 900
900
#1F3A87
oklch(37.7% 0.133 265.7)
-
Step 950
950 (this color)
#0F1F4B
oklch(25.6% 0.085 265.6)
#0F1F4B 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) | #02254D | 0.020 |
| Deuteranopia (no green cones) | #001F4A | 0.015 |
| Tritanopia (no blue cones) | #002A31 | 0.069 |
| Achromatopsia (no color) | #222222 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F1F4B
#0F1F4B
oklch(25.6% 0.085 265.6)
- #2E2100
#2E2100
oklch(25.6% 0.052 86.9)
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 #0F1F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Navy Blue #001146 ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.054
- Marine #042E60 ΔE 0.056
- Dark #1B2431 ΔE 0.057
- Rich Black #0D1B2A ΔE 0.063
- Darkblue #030764 ΔE 0.068
- Midnight Blue #191970 ΔE 0.069
Use #0F1F4B 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.