#1B0000
Closest named color: Very Dark Brown (#1D0200). oklch(13.9% 0.057 29.2), rgb(27, 0, 0).
Aa
White text reads best on this color (20.06:1).
About this color
#1B0000 is a very dark, muted red. In OKLCH its lightness is 14%, its chroma 0.057 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.013 away. White text reads best on it, at 20.06:1.
| 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 | 20.06:1 |
Values
| HEX | #1B0000 |
| RGB | rgb(27, 0, 0) |
| HSL | hsl(0, 100%, 5%) |
| OKLCH | oklch(13.9% 0.057 29.2) |
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 #1B0000 | 20.06:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #1B0000 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #1B0000 text on white | 20.06:1 | AAA | Lc 105.6 | Preferred for body text |
| #1B0000 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
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D0CB
oklch(88.4% 0.038 28.1)
-
Step 300
300
#E9B1A7
oklch(80.9% 0.067 30.1)
-
Step 400
400
#DC8679
oklch(70.8% 0.108 29.3)
-
Step 500
500
#D06556
oklch(63.2% 0.138 29.7)
-
Step 600
600
#BB493C
oklch(55.6% 0.15 29.2)
-
Step 700
700
#A1392E
oklch(49.1% 0.14 29.1)
-
Step 800
800
#833027
oklch(42.7% 0.116 29)
-
Step 900
900
#692C24
oklch(37.7% 0.089 29.5)
-
Step 950
950 (this color)
#1B0000
oklch(13.9% 0.057 29.2)
#1B0000 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) | #050400 | 0.064 |
| Deuteranopia (no green cones) | #0D0A00 | 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°).
- #1B0000
#1B0000
oklch(13.9% 0.057 29.2)
- #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 #1B0000, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.013
- Almost Black #070D0D ΔE 0.068
- Dark Maroon #3C0008 ΔE 0.093
- Rich Navy #001219 ΔE 0.093
- Deep Brown #410200 ΔE 0.105
- Rich Black #0D1B2A ΔE 0.117
- Dark Brown #341C02 ΔE 0.119
- Very Dark Purple #2A0134 ΔE 0.119
Use #1B0000 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.