#0F4491
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.138 258.9), rgb(15, 68, 145).
Aa
White text reads best on this color (9.30:1).
About this color
#0F4491 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.138 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 9.30:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #0F4491 |
| RGB | rgb(15, 68, 145) |
| HSL | hsl(216, 81%, 31%) |
| OKLCH | oklch(40.2% 0.138 258.9) |
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 #0F4491 | 9.30:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #0F4491 | 2.25:1 | Fails | Lc 13.1 | Not readable |
| #0F4491 text on white | 9.30:1 | AAA | Lc 90.9 | Preferred for body text |
| #0F4491 text on black | 2.25:1 | Fails | Lc -11.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6EA1F1
oklch(70.7% 0.13 259.1)
-
Step 500
500
#4687EC
oklch(63.1% 0.166 259)
-
Step 600
600
#266EDA
oklch(55.5% 0.18 258.9)
-
Step 700
700
#195BBD
oklch(49% 0.168 259.1)
-
Step 800
800 (this color)
#0F4491
oklch(40.2% 0.138 258.9)
-
Step 900
900
#1A407A
oklch(37.8% 0.108 258.8)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#0F4491 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) | #0C4D94 | 0.025 |
| Deuteranopia (no green cones) | #00418F | 0.012 |
| Tritanopia (no blue cones) | #005763 | 0.106 |
| Achromatopsia (no color) | #474747 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F4491
#0F4491
oklch(40.2% 0.138 258.9)
- #604200
#604200
oklch(40.2% 0.084 79.3)
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 #0F4491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Twilight Blue #0A437A ΔE 0.039
- Light Navy #155084 ΔE 0.044
- Dusk Blue #26538D ΔE 0.050
- Sapphire #2138AB ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.056
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.064
Use #0F4491 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.