#0D1528
Closest named color: Rich Black (#0D1B2A). oklch(19.9% 0.04 265.6), rgb(13, 21, 40).
Aa
White text reads best on this color (18.18:1).
About this color
#0D1528 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.040 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 18.18:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.18:1 |
Values
| HEX | #0D1528 |
| RGB | rgb(13, 21, 40) |
| HSL | hsl(222, 51%, 10%) |
| OKLCH | oklch(19.9% 0.04 265.6) |
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 #0D1528 | 18.18:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #0D1528 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #0D1528 text on white | 18.18:1 | AAA | Lc 104.8 | Preferred for body text |
| #0D1528 text on black | 1.15:1 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E0
oklch(81% 0.047 264.9)
-
Step 400
400
#8AA0D1
oklch(70.7% 0.076 265.7)
-
Step 500
500
#6D88C5
oklch(63.1% 0.098 265.5)
-
Step 600
600
#5571B1
oklch(55.6% 0.105 265.2)
-
Step 700
700
#465E99
oklch(49.1% 0.099 266.1)
-
Step 800
800
#394D7C
oklch(42.6% 0.082 265.6)
-
Step 900
900
#314063
oklch(37.5% 0.063 265.8)
-
Step 950
950 (this color)
#0D1528
oklch(19.9% 0.04 265.6)
#0D1528 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) | #0D1729 | 0.007 |
| Deuteranopia (no green cones) | #0A1428 | 0.006 |
| Tritanopia (no blue cones) | #02191C | 0.036 |
| Achromatopsia (no color) | #151515 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D1528
#0D1528
oklch(19.9% 0.04 265.6)
- #1E1400
#1E1400
oklch(19.9% 0.041 85.5)
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 #0D1528, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Rich Navy #001219 ΔE 0.041
- Almost Black #070D0D ΔE 0.060
- Dark #1B2431 ΔE 0.060
- Navy Blue #001146 ΔE 0.063
- Dark Navy #000435 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.070
- Jet #212529 ΔE 0.070
Use #0D1528 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.