#A0001B
Closest named color: Carmine (#9D0216). oklch(44.5% 0.18 23.9), rgb(160, 0, 27).
Aa
White text reads best on this color (8.36:1).
About this color
#A0001B is a dark, vivid red. In OKLCH its lightness is 44%, its chroma 0.180 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Carmine (#9D0216), ΔE 0.008 away. White text reads best on it, at 8.36:1.
| Hue family | Reds |
| Lightness | dark (44%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Carmine (#9D0216) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #A0001B |
| RGB | rgb(160, 0, 27) |
| HSL | hsl(350, 100%, 31%) |
| OKLCH | oklch(44.5% 0.18 23.9) |
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 #A0001B | 8.36:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #A0001B | 2.51:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #A0001B text on white | 8.36:1 | AAA | Lc 86.3 | Fine for body text |
| #A0001B text on black | 2.51:1 | Fails | Lc -15.8 | Dividers and decoration only |
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 800.
-
Step 50
50
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FEE3E0
oklch(93.7% 0.03 25.3)
-
Step 200
200
#FECBC7
oklch(88.6% 0.058 23.5)
-
Step 300
300
#FDA6A0
oklch(80.9% 0.104 23.9)
-
Step 400
400
#F86F6C
oklch(70.7% 0.169 23.6)
-
Step 500
500
#F03C44
oklch(63.2% 0.215 23.8)
-
Step 600
600
#D80028
oklch(55.6% 0.225 24)
-
Step 700
700
#B70020
oklch(49.1% 0.199 24)
-
Step 800
800 (this color)
#A0001B
oklch(44.5% 0.18 23.9)
-
Step 900
900
#7B1019
oklch(37.7% 0.14 23.8)
-
Step 950
950
#490D0F
oklch(27% 0.09 24)
#A0001B 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) | #40391A | 0.200 |
| Deuteranopia (no green cones) | #645913 | 0.181 |
| Tritanopia (no blue cones) | #B10010 | 0.038 |
| Achromatopsia (no color) | #4E4E4E | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A0001B
#A0001B
oklch(44.5% 0.18 23.9)
- #006067
#006067
oklch(44.6% 0.076 203.5)
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 #A0001B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carmine #9D0216 ΔE 0.008
- Deep Red #9A0200 ΔE 0.022
- Blood Red #980002 ΔE 0.024
- Auburn #9B2226 ΔE 0.025
- Burnt Red #9F2305 ΔE 0.036
- Cranberry #9E003A ΔE 0.039
- Brick Red #8F1402 ΔE 0.041
- Brown #A52A2A ΔE 0.041
Use #A0001B 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.