#A10101
Closest named color: Carmine (#9D0216). oklch(44.6% 0.182 29.2), rgb(161, 1, 1).
Aa
White text reads best on this color (8.33:1).
About this color
#A10101 is a dark, vivid red. In OKLCH its lightness is 45%, its chroma 0.182 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Carmine (#9D0216), ΔE 0.015 away. White text reads best on it, at 8.33:1.
| Hue family | Reds |
| Lightness | dark (45%) |
| Chroma | vivid (0.182) |
| Temperature | warm |
| Nearest name | Carmine (#9D0216) |
| Black text | 2.52:1 |
| White text | 8.33:1 |
Values
| HEX | #A10101 |
| RGB | rgb(161, 1, 1) |
| HSL | hsl(0, 99%, 32%) |
| OKLCH | oklch(44.6% 0.182 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 #A10101 | 8.33:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #A10101 | 2.52:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #A10101 text on white | 8.33:1 | AAA | Lc 86.2 | Fine for body text |
| #A10101 text on black | 2.52:1 | Fails | Lc -15.9 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FECBC3
oklch(88.5% 0.059 28.6)
-
Step 300
300
#FEA699
oklch(80.9% 0.107 28.8)
-
Step 400
400
#F8705F
oklch(70.6% 0.17 29.2)
-
Step 500
500
#F13D2F
oklch(63.2% 0.218 29.2)
-
Step 600
600
#D90001
oklch(55.6% 0.228 29.2)
-
Step 700
700
#B80001
oklch(49.1% 0.202 29.1)
-
Step 800
800 (this color)
#A10101
oklch(44.6% 0.182 29.2)
-
Step 900
900
#7C100A
oklch(37.7% 0.142 29.2)
-
Step 950
950
#490E09
oklch(27% 0.09 29.2)
#A10101 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) | #423900 | 0.200 |
| Deuteranopia (no green cones) | #655900 | 0.177 |
| Tritanopia (no blue cones) | #B20007 | 0.037 |
| Achromatopsia (no color) | #4E4E4E | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A10101
#A10101
oklch(44.6% 0.182 29.2)
- #005F6B
#005F6B
oklch(44.5% 0.077 209.7)
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 #A10101, closest first.
No curated palette has a color within ΔE 0.04 of #A10101.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carmine #9D0216 ΔE 0.015
- Deep Red #9A0200 ΔE 0.015
- Blood Red #980002 ΔE 0.020
- Burnt Red #9F2305 ΔE 0.027
- Auburn #9B2226 ΔE 0.030
- Brick Red #8F1402 ΔE 0.037
- Rufous #AE2012 ΔE 0.041
- Rust Red #AA2704 ΔE 0.042
Use #A10101 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.