#100F23
Closest named color: Rich Navy (#001219). oklch(18.2% 0.04 283.9), rgb(16, 15, 35).
Aa
White text reads best on this color (18.84:1).
About this color
#100F23 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.040 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.039 away. White text reads best on it, at 18.84:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.84:1 |
Values
| HEX | #100F23 |
| RGB | rgb(16, 15, 35) |
| HSL | hsl(243, 40%, 10%) |
| OKLCH | oklch(18.2% 0.04 283.9) |
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 #100F23 | 18.84:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #100F23 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #100F23 text on white | 18.84:1 | AAA | Lc 105.3 | Preferred for body text |
| #100F23 text on black | 1.11:1 | 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
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EB
oklch(88.4% 0.027 283.5)
-
Step 300
300
#BCBDDF
oklch(80.9% 0.048 283.9)
-
Step 400
400
#9A9BCF
oklch(70.8% 0.076 283.4)
-
Step 500
500
#8281C3
oklch(63.1% 0.098 283.9)
-
Step 600
600
#6C6AAF
oklch(55.6% 0.106 283.7)
-
Step 700
700
#5A5896
oklch(49.1% 0.098 283.6)
-
Step 800
800
#4A487A
oklch(42.7% 0.082 284.2)
-
Step 900
900
#3D3D62
oklch(37.7% 0.063 283)
-
Step 950
950 (this color)
#100F23
oklch(18.2% 0.04 283.9)
#100F23 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) | #081224 | 0.016 |
| Deuteranopia (no green cones) | #071123 | 0.016 |
| Tritanopia (no blue cones) | #0A1317 | 0.034 |
| Achromatopsia (no color) | #111111 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100F23
#100F23
oklch(18.2% 0.04 283.9)
- #151300
#151300
oklch(18.3% 0.039 104.9)
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 #100F23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.042
- Almost Black #070D0D ΔE 0.051
- Dark Navy #000435 ΔE 0.063
- Midnight #03012D ΔE 0.063
- Dark Navy Blue #00022E ΔE 0.066
- Very Dark Blue #000133 ΔE 0.071
- Navy Blue #001146 ΔE 0.072
Use #100F23 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.