#0F1828
Closest named color: Rich Black (#0D1B2A). oklch(20.9% 0.035 261.4), rgb(15, 24, 40).
Aa
White text reads best on this color (17.77:1).
About this color
#0F1828 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.035 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.011 away. White text reads best on it, at 17.77:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.77:1 |
Values
| HEX | #0F1828 |
| RGB | rgb(15, 24, 40) |
| HSL | hsl(218, 45%, 11%) |
| OKLCH | oklch(20.9% 0.035 261.4) |
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 #0F1828 | 17.77:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #0F1828 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #0F1828 text on white | 17.77:1 | AAA | Lc 104.5 | Preferred for body text |
| #0F1828 text on black | 1.18:1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C1DC
oklch(80.8% 0.042 262.3)
-
Step 400
400
#8AA1CA
oklch(70.6% 0.066 261.9)
-
Step 500
500
#6D8ABD
oklch(63.2% 0.084 261.4)
-
Step 600
600
#5573A9
oklch(55.6% 0.092 261.6)
-
Step 700
700
#456091
oklch(49% 0.086 261.7)
-
Step 800
800
#394F76
oklch(42.8% 0.071 261.4)
-
Step 900
900
#31425F
oklch(37.8% 0.055 260.8)
-
Step 950
950 (this color)
#0F1828
oklch(20.9% 0.035 261.4)
#0F1828 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) | #121929 | 0.007 |
| Deuteranopia (no green cones) | #0F1728 | 0.004 |
| Tritanopia (no blue cones) | #051B1E | 0.030 |
| Achromatopsia (no color) | #181818 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F1828
#0F1828
oklch(20.9% 0.035 261.4)
- #201604
#201604
oklch(20.8% 0.035 81.3)
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 #0F1828, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.011
- Rich Navy #001219 ΔE 0.046
- Dark #1B2431 ΔE 0.049
- Jet #212529 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.061
- Almost Black #070D0D ΔE 0.065
- Navy Blue #001146 ΔE 0.068
- Dark Navy #000435 ΔE 0.078
Use #0F1828 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.