#0F4C9F
Closest named color: Cobalt (#1E488F). oklch(43.1% 0.148 258.2), rgb(15, 76, 159).
Aa
White text reads best on this color (8.22:1).
About this color
#0F4C9F is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.148 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 8.22:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #0F4C9F |
| RGB | rgb(15, 76, 159) |
| HSL | hsl(215, 83%, 34%) |
| OKLCH | oklch(43.1% 0.148 258.2) |
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 #0F4C9F | 8.22:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #0F4C9F | 2.55:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #0F4C9F text on white | 8.22:1 | AAA | Lc 87.8 | Fine for body text |
| #0F4C9F text on black | 2.55:1 | Fails | Lc -14.3 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9EC3F9
oklch(81% 0.087 257.7)
-
Step 400
400
#69A1F6
oklch(70.7% 0.139 258.5)
-
Step 500
500
#3E87F2
oklch(63.2% 0.176 258.2)
-
Step 600
600
#186DE0
oklch(55.5% 0.192 258.3)
-
Step 700
700
#085BC3
oklch(49.2% 0.178 258.2)
-
Step 800
800 (this color)
#0F4C9F
oklch(43.1% 0.148 258.2)
-
Step 900
900
#143F7D
oklch(37.6% 0.115 258.3)
-
Step 950
950
#0D2649
oklch(27.1% 0.072 257.4)
#0F4C9F 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) | #1155A2 | 0.025 |
| Deuteranopia (no green cones) | #00499D | 0.011 |
| Tritanopia (no blue cones) | #00606E | 0.111 |
| Achromatopsia (no color) | #4F4F4F | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F4C9F
#0F4C9F
oklch(43.1% 0.148 258.2)
- #6B4900
#6B4900
oklch(43.2% 0.09 78.2)
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 #0F4C9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Dusk Blue #26538D ΔE 0.041
- Light Navy #155084 ΔE 0.048
- Sapphire #2138AB ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.057
- Blueberry #464196 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.065
- Light Navy Blue #2E5A88 ΔE 0.065
Use #0F4C9F 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.