#A11B09
Closest named color: Burnt Red (#9F2305). oklch(45.8% 0.171 31), rgb(161, 27, 9).
Aa
White text reads best on this color (7.84:1).
About this color
#A11B09 is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.171 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Red (#9F2305), ΔE 0.010 away. White text reads best on it, at 7.84:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Burnt Red (#9F2305) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #A11B09 |
| RGB | rgb(161, 27, 9) |
| HSL | hsl(7, 89%, 33%) |
| OKLCH | oklch(45.8% 0.171 31) |
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 #A11B09 | 7.84:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #A11B09 | 2.67:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #A11B09 text on white | 7.84:1 | AAA | Lc 85.5 | Fine for body text |
| #A11B09 text on black | 2.67:1 | Fails | Lc -16.5 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FDE3DE
oklch(93.6% 0.03 30.6)
-
Step 200
200
#FCCCC3
oklch(88.5% 0.056 30.5)
-
Step 300
300
#FAA899
oklch(80.8% 0.1 30.8)
-
Step 400
400
#F37560
oklch(70.6% 0.159 31.1)
-
Step 500
500
#EB4731
oklch(63.1% 0.204 30.9)
-
Step 600
600
#D51C00
oklch(55.7% 0.217 31)
-
Step 700
700
#B41600
oklch(49.1% 0.191 31)
-
Step 800
800 (this color)
#A11B09
oklch(45.8% 0.171 31)
-
Step 900
900
#79180B
oklch(37.8% 0.133 31.1)
-
Step 950
950
#471109
oklch(27% 0.084 31.3)
#A11B09 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) | #483F03 | 0.184 |
| Deuteranopia (no green cones) | #685C00 | 0.165 |
| Tritanopia (no blue cones) | #B2001A | 0.038 |
| Achromatopsia (no color) | #525252 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A11B09
#A11B09
oklch(45.8% 0.171 31)
- #006370
#006370
oklch(45.8% 0.079 210.3)
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 #A11B09, closest first.
No curated palette has a color within ΔE 0.04 of #A11B09.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Red #9F2305 ΔE 0.010
- Auburn #9B2226 ΔE 0.023
- Carmine #9D0216 ΔE 0.026
- Deep Red #9A0200 ΔE 0.027
- Rust Red #AA2704 ΔE 0.028
- Brown #A52A2A ΔE 0.030
- Rufous #AE2012 ΔE 0.030
- Blood Red #980002 ΔE 0.032
Use #A11B09 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.