#AC2811
Closest named color: Rust Red (#AA2704). oklch(48.9% 0.172 32.2), rgb(172, 40, 17).
Aa
White text reads best on this color (6.84:1).
About this color
#AC2811 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.172 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Red (#AA2704), ΔE 0.007 away. White text reads best on it, at 6.84:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #AC2811 |
| RGB | rgb(172, 40, 17) |
| HSL | hsl(9, 82%, 37%) |
| OKLCH | oklch(48.9% 0.172 32.2) |
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 #AC2811 | 6.84:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #AC2811 | 3.06:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #AC2811 text on white | 6.84:1 | AA | Lc 82.2 | Fine for body text |
| #AC2811 text on black | 3.06:1 | AA large text | Lc -19.7 | 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 700.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F6CFC6
oklch(88.5% 0.046 33.2)
-
Step 300
300
#F1AD9F
oklch(80.8% 0.083 31.9)
-
Step 400
400
#E77F6B
oklch(70.7% 0.132 32)
-
Step 500
500
#DD5942
oklch(63.1% 0.17 32)
-
Step 600
600
#C83820
oklch(55.5% 0.185 32.1)
-
Step 700
700 (this color)
#AC2811
oklch(48.9% 0.172 32.2)
-
Step 800
800
#8C2413
oklch(42.6% 0.142 32)
-
Step 900
900
#712417
oklch(37.7% 0.112 32)
-
Step 950
950
#42170F
oklch(27% 0.069 32.4)
#AC2811 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) | #52480B | 0.182 |
| Deuteranopia (no green cones) | #726505 | 0.165 |
| Tritanopia (no blue cones) | #BE0025 | 0.047 |
| Achromatopsia (no color) | #5A5A5A | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2811
#AC2811
oklch(48.9% 0.172 32.2)
- #006C7C
#006C7C
oklch(48.8% 0.085 212.4)
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 #AC2811, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.007
- Rufous #AE2012 ΔE 0.010
- Rusty Red #AF2F0D ΔE 0.014
- Firebrick #B22222 ΔE 0.020
- Brown #A52A2A ΔE 0.024
- Brick #A03623 ΔE 0.028
- Burnt Red #9F2305 ΔE 0.030
- Russet #A13905 ΔE 0.034
Use #AC2811 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.