#10152D
Closest named color: Rich Black (#0D1B2A). oklch(20.5% 0.048 272.6), rgb(16, 21, 45).
Aa
White text reads best on this color (17.99:1).
About this color
#10152D is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.048 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 17.99:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.99:1 |
Values
| HEX | #10152D |
| RGB | rgb(16, 21, 45) |
| HSL | hsl(230, 48%, 12%) |
| OKLCH | oklch(20.5% 0.048 272.6) |
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 #10152D | 17.99:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #10152D | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #10152D text on white | 17.99:1 | AAA | Lc 104.7 | Preferred for body text |
| #10152D 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE6
oklch(80.9% 0.056 272.7)
-
Step 400
400
#8D9DDA
oklch(70.7% 0.091 272.6)
-
Step 500
500
#7284D0
oklch(63.2% 0.116 272.6)
-
Step 600
600
#5B6CBD
oklch(55.6% 0.127 272.7)
-
Step 700
700
#4B5AA3
oklch(49.2% 0.118 272.6)
-
Step 800
800
#3D4A84
oklch(42.7% 0.097 272.2)
-
Step 900
900
#343E6A
oklch(37.7% 0.076 272.6)
-
Step 950
950 (this color)
#10152D
oklch(20.5% 0.048 272.6)
#10152D 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) | #0B182E | 0.012 |
| Deuteranopia (no green cones) | #08152C | 0.012 |
| Tritanopia (no blue cones) | #041A1E | 0.043 |
| Achromatopsia (no color) | #171717 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10152D
#10152D
oklch(20.5% 0.048 272.6)
- #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 #10152D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.052
- Navy Blue #001146 ΔE 0.056
- Dark #1B2431 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.065
- Dark Navy #000435 ΔE 0.066
- Jet #212529 ΔE 0.069
- Almost Black #070D0D ΔE 0.071
Use #10152D 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.