#0F182E
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.046 265.9), rgb(15, 24, 46).
Aa
White text reads best on this color (17.64:1).
About this color
#0F182E is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.046 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.015 away. White text reads best on it, at 17.64:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.64:1 |
Values
| HEX | #0F182E |
| RGB | rgb(15, 24, 46) |
| HSL | hsl(223, 51%, 12%) |
| OKLCH | oklch(21.3% 0.046 265.9) |
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 #0F182E | 17.64:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #0F182E | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #0F182E text on white | 17.64:1 | AAA | Lc 104.4 | Preferred for body text |
| #0F182E text on black | 1.19:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#87A0D7
oklch(70.8% 0.086 265.4)
-
Step 500
500
#6A87CC
oklch(63.1% 0.11 266)
-
Step 600
600
#5270B9
oklch(55.6% 0.119 265.8)
-
Step 700
700
#425DA0
oklch(49% 0.112 265.9)
-
Step 800
800
#374C81
oklch(42.6% 0.092 266.3)
-
Step 900
900
#2F4068
oklch(37.7% 0.072 265.6)
-
Step 950
950 (this color)
#0F182E
oklch(21.3% 0.046 265.9)
#0F182E 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) | #0F1A2F | 0.007 |
| Deuteranopia (no green cones) | #0B172E | 0.007 |
| Tritanopia (no blue cones) | #011D20 | 0.042 |
| Achromatopsia (no color) | #191919 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F182E
#0F182E
oklch(21.3% 0.046 265.9)
- #221700
#221700
oklch(21.3% 0.044 85.3)
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 #0F182E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.015
- Dark #1B2431 ΔE 0.048
- Rich Navy #001219 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.056
- Navy Blue #001146 ΔE 0.057
- Jet #212529 ΔE 0.061
- Dark Navy #000435 ΔE 0.073
- Almost Black #070D0D ΔE 0.075
Use #0F182E 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.