#1B101D
Closest named color: Rich Black (#0D1B2A). oklch(19.4% 0.03 321.2), rgb(27, 16, 29).
Aa
White text reads best on this color (18.44:1).
About this color
#1B101D is a very dark, muted purple. In OKLCH its lightness is 19%, its chroma 0.030 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 18.44:1.
| Hue family | Purples |
| Lightness | very dark (19%) |
| Chroma | muted (0.030) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.44:1 |
Values
| HEX | #1B101D |
| RGB | rgb(27, 16, 29) |
| HSL | hsl(291, 29%, 9%) |
| OKLCH | oklch(19.4% 0.03 321.2) |
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 #1B101D | 18.44:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #1B101D | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #1B101D text on white | 18.44:1 | AAA | Lc 105.0 | Preferred for body text |
| #1B101D 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
#F7F4F7
oklch(97% 0.005 325.6)
-
Step 100
100
#EDE8EE
oklch(93.7% 0.01 320.5)
-
Step 200
200
#DFD5E1
oklch(88.5% 0.019 320.6)
-
Step 300
300
#CCB9CF
oklch(80.8% 0.037 321.6)
-
Step 400
400
#B295B7
oklch(70.7% 0.059 321.3)
-
Step 500
500
#9E7BA5
oklch(63.1% 0.074 320.7)
-
Step 600
600
#896390
oklch(55.5% 0.081 321.1)
-
Step 700
700
#74527A
oklch(49% 0.075 321.4)
-
Step 800
800
#5F4464
oklch(42.9% 0.062 321.1)
-
Step 900
900
#4D3951
oklch(37.6% 0.048 320.7)
-
Step 950
950 (this color)
#1B101D
oklch(19.4% 0.03 321.2)
#1B101D 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) | #0F131E | 0.025 |
| Deuteranopia (no green cones) | #11141D | 0.024 |
| Tritanopia (no blue cones) | #1B1115 | 0.018 |
| Achromatopsia (no color) | #141414 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B101D
#1B101D
oklch(19.4% 0.03 321.2)
- #0D180B
#0D180B
oklch(19.4% 0.03 140.7)
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 #1B101D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.045
- Rich Navy #001219 ΔE 0.053
- Almost Black #070D0D ΔE 0.056
- Very Dark Brown #1D0200 ΔE 0.069
- Very Dark Purple #2A0134 ΔE 0.070
- Dark #1B2431 ΔE 0.071
- Midnight Purple #280137 ΔE 0.072
- Jet #212529 ΔE 0.074
Use #1B101D 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.