#AC2A09
Closest named color: Rust Red (#AA2704). oklch(49.1% 0.171 33.9), rgb(172, 42, 9).
Aa
White text reads best on this color (6.79:1).
About this color
#AC2A09 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.171 and its hue 34°. 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 6.79:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #AC2A09 |
| RGB | rgb(172, 42, 9) |
| HSL | hsl(12, 90%, 35%) |
| OKLCH | oklch(49.1% 0.171 33.9) |
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 #AC2A09 | 6.79:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #AC2A09 | 3.08:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #AC2A09 text on white | 6.79:1 | AA | Lc 82.0 | Fine for body text |
| #AC2A09 text on black | 3.08:1 | AA large text | Lc -19.9 | 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 700.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F6CFC6
oklch(88.5% 0.046 33.2)
-
Step 300
300
#F1AE9E
oklch(81% 0.082 33.9)
-
Step 400
400
#E78068
oklch(70.8% 0.132 34.1)
-
Step 500
500
#DC5A3E
oklch(63% 0.169 33.8)
-
Step 600
600
#C83A19
oklch(55.7% 0.184 34)
-
Step 700
700 (this color)
#AC2A09
oklch(49.1% 0.171 33.9)
-
Step 800
800
#8C250E
oklch(42.7% 0.142 33.7)
-
Step 900
900
#702515
oklch(37.6% 0.11 33.7)
-
Step 950
950
#42170D
oklch(27% 0.07 34.5)
#AC2A09 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) | #534901 | 0.180 |
| Deuteranopia (no green cones) | #736500 | 0.161 |
| Tritanopia (no blue cones) | #BE0025 | 0.050 |
| Achromatopsia (no color) | #5B5B5B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2A09
#AC2A09
oklch(49.1% 0.171 33.9)
- #006D7E
#006D7E
oklch(49.1% 0.086 213.3)
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 #AC2A09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.007
- Rusty Red #AF2F0D ΔE 0.011
- Rufous #AE2012 ΔE 0.014
- Firebrick #B22222 ΔE 0.024
- Brick #A03623 ΔE 0.028
- Brown #A52A2A ΔE 0.028
- Russet #A13905 ΔE 0.030
- Burnt Red #9F2305 ΔE 0.031
Use #AC2A09 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.