#100F27
Closest named color: Rich Black (#0D1B2A). oklch(18.5% 0.048 282.6), rgb(16, 15, 39).
Aa
White text reads best on this color (18.75:1).
About this color
#100F27 is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.048 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 18.75:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.11:1 |
| White text | 18.75:1 |
Values
| HEX | #100F27 |
| RGB | rgb(16, 15, 39) |
| HSL | hsl(243, 44%, 11%) |
| OKLCH | oklch(18.5% 0.048 282.6) |
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 #100F27 | 18.75:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #100F27 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #100F27 text on white | 18.75:1 | AAA | Lc 105.2 | Preferred for body text |
| #100F27 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EE
oklch(88.5% 0.032 281.8)
-
Step 300
300
#BABDE5
oklch(80.9% 0.056 281.7)
-
Step 400
400
#989AD8
oklch(70.8% 0.09 282.4)
-
Step 500
500
#7F7FCD
oklch(63% 0.116 282.5)
-
Step 600
600
#6A68BA
oklch(55.7% 0.125 282.7)
-
Step 700
700
#5856A0
oklch(49.1% 0.116 282.5)
-
Step 800
800
#484782
oklch(42.8% 0.096 282.3)
-
Step 900
900
#3C3C68
oklch(37.8% 0.074 282.3)
-
Step 950
950 (this color)
#100F27
oklch(18.5% 0.048 282.6)
#100F27 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) | #051328 | 0.021 |
| Deuteranopia (no green cones) | #051126 | 0.020 |
| Tritanopia (no blue cones) | #081419 | 0.040 |
| Achromatopsia (no color) | #121212 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100F27
#100F27
oklch(18.5% 0.048 282.6)
- #161300
#161300
oklch(18.5% 0.039 102.4)
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 #100F27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Rich Navy #001219 ΔE 0.045
- Dark Navy #000435 ΔE 0.058
- Almost Black #070D0D ΔE 0.058
- Midnight #03012D ΔE 0.060
- Dark Navy Blue #00022E ΔE 0.063
- Navy Blue #001146 ΔE 0.065
- Very Dark Blue #000133 ΔE 0.066
Use #100F27 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.