#10102B
Closest named color: Rich Black (#0D1B2A). oklch(19.1% 0.053 280.1), rgb(16, 16, 43).
Aa
White text reads best on this color (18.56:1).
About this color
#10102B is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.053 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 18.56:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.56:1 |
Values
| HEX | #10102B |
| RGB | rgb(16, 16, 43) |
| HSL | hsl(240, 46%, 12%) |
| OKLCH | oklch(19.1% 0.053 280.1) |
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 #10102B | 18.56:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #10102B | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #10102B text on white | 18.56:1 | AAA | Lc 105.1 | Preferred for body text |
| #10102B text on black | 1.13:1 | 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
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B8BDE9
oklch(80.9% 0.062 279.8)
-
Step 400
400
#9499DF
oklch(70.6% 0.102 280.3)
-
Step 500
500
#7B7FD6
oklch(63.1% 0.13 280)
-
Step 600
600
#6567C3
oklch(55.7% 0.14 279.9)
-
Step 700
700
#5455A8
oklch(49.1% 0.13 280)
-
Step 800
800
#454688
oklch(42.7% 0.107 280.2)
-
Step 900
900
#3A3B6D
oklch(37.7% 0.084 280.7)
-
Step 950
950 (this color)
#10102B
oklch(19.1% 0.053 280.1)
#10102B 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) | #04142C | 0.021 |
| Deuteranopia (no green cones) | #03122A | 0.022 |
| Tritanopia (no blue cones) | #06161B | 0.046 |
| Achromatopsia (no color) | #131313 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10102B
#10102B
oklch(19.1% 0.053 280.1)
- #181400
#181400
oklch(19% 0.04 100.1)
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 #10102B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Rich Navy #001219 ΔE 0.050
- Dark Navy #000435 ΔE 0.056
- Navy Blue #001146 ΔE 0.057
- Midnight #03012D ΔE 0.061
- Dark Navy Blue #00022E ΔE 0.063
- Very Dark Blue #000133 ΔE 0.065
- Almost Black #070D0D ΔE 0.066
Use #10102B 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.