#0F4C8B
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.12 253.7), rgb(15, 76, 139).
Aa
White text reads best on this color (8.65:1).
About this color
#0F4C8B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.120 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #0F4C8B |
| RGB | rgb(15, 76, 139) |
| HSL | hsl(210, 81%, 30%) |
| OKLCH | oklch(41.6% 0.12 253.7) |
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 #0F4C8B | 8.65:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #0F4C8B | 2.42:1 | Fails | Lc 14.8 | Not readable |
| #0F4C8B text on white | 8.65:1 | AAA | Lc 89.2 | Fine for body text |
| #0F4C8B text on black | 2.42:1 | Fails | Lc -13.0 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6DA4E5
oklch(70.7% 0.112 253.4)
-
Step 500
500
#448BDE
oklch(63% 0.144 254)
-
Step 600
600
#2174CB
oklch(55.7% 0.155 253.5)
-
Step 700
700
#1160B0
oklch(49% 0.146 253.9)
-
Step 800
800 (this color)
#0F4C8B
oklch(41.6% 0.12 253.7)
-
Step 900
900
#184272
oklch(37.7% 0.095 254)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#0F4C8B 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) | #2B518D | 0.028 |
| Deuteranopia (no green cones) | #10478A | 0.014 |
| Tritanopia (no blue cones) | #005B64 | 0.090 |
| Achromatopsia (no color) | #4C4C4C | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F4C8B
#0F4C8B
oklch(41.6% 0.12 253.7)
- #684300
#684300
oklch(41.5% 0.088 73.6)
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 #0F4C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Light Navy #155084 ΔE 0.019
- Dusk Blue #26538D ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.030
- Twilight Blue #0A437A ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.063
- Blueberry #464196 ΔE 0.064
Use #0F4C8B 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.