#1B0001
Closest named color: Very Dark Brown (#1D0200). oklch(14% 0.057 24.5), rgb(27, 0, 1).
Aa
White text reads best on this color (20.05:1).
About this color
#1B0001 is a very dark, muted red. In OKLCH its lightness is 14%, its chroma 0.057 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.015 away. White text reads best on it, at 20.05:1.
| Hue family | Reds |
| Lightness | very dark (14%) |
| Chroma | muted (0.057) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.04:1 |
| White text | 20.05:1 |
Values
| HEX | #1B0001 |
| RGB | rgb(27, 0, 1) |
| HSL | hsl(358, 100%, 5%) |
| OKLCH | oklch(14% 0.057 24.5) |
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 #1B0001 | 20.05:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #1B0001 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #1B0001 text on white | 20.05:1 | AAA | Lc 105.6 | Preferred for body text |
| #1B0001 text on black | 1.04:1 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F1D0CD
oklch(88.5% 0.037 24)
-
Step 300
300
#E9B0AB
oklch(80.8% 0.067 24.4)
-
Step 400
400
#DC857F
oklch(70.7% 0.108 24.4)
-
Step 500
500
#CF645F
oklch(63.1% 0.137 24.5)
-
Step 600
600
#BB4845
oklch(55.6% 0.15 24.7)
-
Step 700
700
#A13837
oklch(49.1% 0.14 24.3)
-
Step 800
800
#82302E
oklch(42.7% 0.114 24.6)
-
Step 900
900
#692B29
oklch(37.6% 0.09 24.2)
-
Step 950
950 (this color)
#1B0001
oklch(14% 0.057 24.5)
#1B0001 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) | #050401 | 0.064 |
| Deuteranopia (no green cones) | #0D0A01 | 0.055 |
| Tritanopia (no blue cones) | #1F0000 | 0.012 |
| Achromatopsia (no color) | #080808 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B0001
#1B0001
oklch(14% 0.057 24.5)
- #000C0E
#000C0E
oklch(14.1% 0.024 205.3)
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 #1B0001, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.015
- Almost Black #070D0D ΔE 0.068
- Rich Navy #001219 ΔE 0.092
- Dark Maroon #3C0008 ΔE 0.092
- Deep Brown #410200 ΔE 0.105
- Very Dark Purple #2A0134 ΔE 0.115
- Rich Black #0D1B2A ΔE 0.115
- Midnight Purple #280137 ΔE 0.120
Use #1B0001 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.