#10152B
Closest named color: Rich Black (#0D1B2A). oklch(20.4% 0.044 272.3), rgb(16, 21, 43).
Aa
White text reads best on this color (18.03:1).
About this color
#10152B is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.044 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 18.03:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.03:1 |
Values
| HEX | #10152B |
| RGB | rgb(16, 21, 43) |
| HSL | hsl(229, 46%, 12%) |
| OKLCH | oklch(20.4% 0.044 272.3) |
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 #10152B | 18.03:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #10152B | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #10152B text on white | 18.03:1 | AAA | Lc 104.7 | Preferred for body text |
| #10152B text on black | 1.16:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B4BFE4
oklch(80.8% 0.054 272.1)
-
Step 400
400
#8E9ED6
oklch(70.8% 0.084 271.8)
-
Step 500
500
#7385CB
oklch(63.2% 0.108 272)
-
Step 600
600
#5C6DB8
oklch(55.6% 0.118 272.4)
-
Step 700
700
#4C5B9E
oklch(49.1% 0.109 272.3)
-
Step 800
800
#3E4B80
oklch(42.8% 0.089 271.8)
-
Step 900
900
#353F67
oklch(37.8% 0.07 272.1)
-
Step 950
950 (this color)
#10152B
oklch(20.4% 0.044 272.3)
#10152B 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) | #0C182C | 0.011 |
| Deuteranopia (no green cones) | #09152B | 0.011 |
| Tritanopia (no blue cones) | #051A1D | 0.041 |
| Achromatopsia (no color) | #161616 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10152B
#10152B
oklch(20.4% 0.044 272.3)
- #1E1600
#1E1600
oklch(20.4% 0.042 91.4)
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 #10152B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Rich Navy #001219 ΔE 0.049
- Dark #1B2431 ΔE 0.057
- Navy Blue #001146 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.066
- Almost Black #070D0D ΔE 0.067
- Dark Navy #000435 ΔE 0.068
- Jet #212529 ΔE 0.069
Use #10152B 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.