#100B23
Closest named color: Rich Navy (#001219). oklch(17.2% 0.048 290), rgb(16, 11, 35).
Aa
White text reads best on this color (19.19:1).
About this color
#100B23 is a very dark, muted purple. In OKLCH its lightness is 17%, its chroma 0.048 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.046 away. White text reads best on it, at 19.19:1.
| Hue family | Purples |
| Lightness | very dark (17%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.19:1 |
Values
| HEX | #100B23 |
| RGB | rgb(16, 11, 35) |
| HSL | hsl(252, 52%, 9%) |
| OKLCH | oklch(17.2% 0.048 290) |
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 #100B23 | 19.19:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #100B23 | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #100B23 text on white | 19.19:1 | AAA | Lc 105.5 | Preferred for body text |
| #100B23 text on black | 1.09:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6ED
oklch(88.5% 0.031 289.7)
-
Step 300
300
#BFBBE4
oklch(80.9% 0.057 289.5)
-
Step 400
400
#9F97D6
oklch(70.7% 0.091 289.7)
-
Step 500
500
#897CCB
oklch(63.1% 0.117 290.2)
-
Step 600
600
#7364B8
oklch(55.6% 0.127 289.8)
-
Step 700
700
#61539E
oklch(49.2% 0.117 290)
-
Step 800
800
#4F4480
oklch(42.7% 0.097 290.1)
-
Step 900
900
#413A67
oklch(37.7% 0.076 289.4)
-
Step 950
950 (this color)
#100B23
oklch(17.2% 0.048 290)
#100B23 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) | #030F24 | 0.026 |
| Deuteranopia (no green cones) | #030E22 | 0.026 |
| Tritanopia (no blue cones) | #0B1015 | 0.039 |
| Achromatopsia (no color) | #0F0F0F | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100B23
#100B23
oklch(17.2% 0.048 290)
- #111100
#111100
oklch(17.2% 0.037 109.8)
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 #100B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.046
- Almost Black #070D0D ΔE 0.054
- Midnight #03012D ΔE 0.054
- Rich Black #0D1B2A ΔE 0.055
- Dark Navy #000435 ΔE 0.058
- Dark Navy Blue #00022E ΔE 0.059
- Very Dark Blue #000133 ΔE 0.064
- Midnight Purple #280137 ΔE 0.071
Use #100B23 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.