#0F4582
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.116 255.1), rgb(15, 69, 130).
Aa
White text reads best on this color (9.57:1).
About this color
#0F4582 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.116 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.015 away. White text reads best on it, at 9.57:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #0F4582 |
| RGB | rgb(15, 69, 130) |
| HSL | hsl(212, 79%, 28%) |
| OKLCH | oklch(39.3% 0.116 255.1) |
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 #0F4582 | 9.57:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #0F4582 | 2.19:1 | Fails | Lc 12.3 | Not readable |
| #0F4582 text on white | 9.57:1 | AAA | Lc 91.7 | Preferred for body text |
| #0F4582 text on black | 2.19:1 | Fails | Lc -10.7 | 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 900.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBF9
oklch(88.4% 0.048 255.1)
-
Step 300
300
#9BC4F9
oklch(81% 0.087 255.1)
-
Step 400
400
#61A3F5
oklch(70.7% 0.139 254.7)
-
Step 500
500
#2F89F2
oklch(63.2% 0.178 255.1)
-
Step 600
600
#0071DB
oklch(55.7% 0.183 255)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900 (this color)
#0F4582
oklch(39.3% 0.116 255.1)
-
Step 950
950
#092649
oklch(26.9% 0.074 255.3)
#0F4582 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) | #244B84 | 0.026 |
| Deuteranopia (no green cones) | #074081 | 0.016 |
| Tritanopia (no blue cones) | #00545D | 0.088 |
| Achromatopsia (no color) | #454545 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F4582
#0F4582
oklch(39.3% 0.116 255.1)
- #5F3E00
#5F3E00
oklch(39.2% 0.083 75.1)
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 #0F4582, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.015
- Cobalt #1E488F ΔE 0.026
- Light Navy #155084 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.045
- Dusk Blue #26538D ΔE 0.049
- Marine Blue #01386A ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.070
Use #0F4582 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.