#1F0101
Closest named color: Very Dark Brown (#1D0200). oklch(15.4% 0.058 27.6), rgb(31, 1, 1).
Aa
White text reads best on this color (19.75:1).
About this color
#1F0101 is a very dark, muted red. In OKLCH its lightness is 15%, its chroma 0.058 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.008 away. White text reads best on it, at 19.75:1.
| Hue family | Reds |
| Lightness | very dark (15%) |
| Chroma | muted (0.058) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.06:1 |
| White text | 19.75:1 |
Values
| HEX | #1F0101 |
| RGB | rgb(31, 1, 1) |
| HSL | hsl(0, 94%, 6%) |
| OKLCH | oklch(15.4% 0.058 27.6) |
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 #1F0101 | 19.75:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #1F0101 | 1.06:1 | Fails | Lc 0.0 | Not readable |
| #1F0101 text on white | 19.75:1 | AAA | Lc 105.4 | Preferred for body text |
| #1F0101 text on black | 1.06:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F2D0CB
oklch(88.5% 0.039 27.8)
-
Step 300
300
#EAB0A8
oklch(80.8% 0.069 27.6)
-
Step 400
400
#DD857A
oklch(70.7% 0.11 27.8)
-
Step 500
500
#D16358
oklch(63.1% 0.141 27.6)
-
Step 600
600
#BC473E
oklch(55.6% 0.153 27.5)
-
Step 700
700
#A23730
oklch(49% 0.143 27.4)
-
Step 800
800
#842F28
oklch(42.8% 0.119 27.8)
-
Step 900
900
#6A2B25
oklch(37.7% 0.092 27.7)
-
Step 950
950 (this color)
#1F0101
oklch(15.4% 0.058 27.6)
#1F0101 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) | #080601 | 0.062 |
| Deuteranopia (no green cones) | #100D00 | 0.058 |
| Tritanopia (no blue cones) | #230001 | 0.011 |
| Achromatopsia (no color) | #0A0A0A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F0101
#1F0101
oklch(15.4% 0.058 27.6)
- #000F12
#000F12
oklch(15.4% 0.027 208.8)
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 #1F0101, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.008
- Almost Black #070D0D ΔE 0.068
- Dark Maroon #3C0008 ΔE 0.079
- Rich Navy #001219 ΔE 0.090
- Deep Brown #410200 ΔE 0.092
- Dark Brown #341C02 ΔE 0.106
- Rich Black #0D1B2A ΔE 0.108
- Very Dark Purple #2A0134 ΔE 0.110
Use #1F0101 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.