#1D101B
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.03 332.2), rgb(29, 16, 27).
Aa
White text reads best on this color (18.38:1).
About this color
#1D101B is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.048 away. White text reads best on it, at 18.38:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.38:1 |
Values
| HEX | #1D101B |
| RGB | rgb(29, 16, 27) |
| HSL | hsl(309, 29%, 9%) |
| OKLCH | oklch(19.6% 0.03 332.2) |
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 #1D101B | 18.38:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #1D101B | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #1D101B text on white | 18.38:1 | AAA | Lc 105.0 | Preferred for body text |
| #1D101B text on black | 1.14:1 | 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
#EEE7ED
oklch(93.5% 0.011 330.2)
-
Step 200
200
#E1D5DF
oklch(88.6% 0.019 331.1)
-
Step 300
300
#CFB9CB
oklch(81% 0.035 331.9)
-
Step 400
400
#B694B0
oklch(70.6% 0.056 332.2)
-
Step 500
500
#A47A9D
oklch(63.2% 0.071 332.3)
-
Step 600
600
#8E6288
oklch(55.5% 0.078 331.4)
-
Step 700
700
#795173
oklch(49.1% 0.073 332)
-
Step 800
800
#63435E
oklch(42.9% 0.06 332.2)
-
Step 900
900
#51384D
oklch(37.7% 0.048 332.2)
-
Step 950
950 (this color)
#1D101B
oklch(19.6% 0.03 332.2)
#1D101B 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) | #10131B | 0.028 |
| Deuteranopia (no green cones) | #13151B | 0.026 |
| Tritanopia (no blue cones) | #1E1114 | 0.016 |
| Achromatopsia (no color) | #141414 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D101B
#1D101B
oklch(19.6% 0.03 332.2)
- #0A190E
#0A190E
oklch(19.6% 0.03 151.3)
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 #1D101B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.048
- Rich Navy #001219 ΔE 0.057
- Almost Black #070D0D ΔE 0.057
- Very Dark Brown #1D0200 ΔE 0.066
- Dark #1B2431 ΔE 0.071
- Very Dark Purple #2A0134 ΔE 0.072
- Jet #212529 ΔE 0.073
- Midnight Purple #280137 ΔE 0.074
Use #1D101B 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.