#AC272B
Closest named color: Firebrick (#B22222). oklch(49.1% 0.169 24.7), rgb(172, 39, 43).
Aa
White text reads best on this color (6.81:1).
About this color
#AC272B is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.169 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.014 away. White text reads best on it, at 6.81:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.07:1 |
| White text | 6.81:1 |
Values
| HEX | #AC272B |
| RGB | rgb(172, 39, 43) |
| HSL | hsl(358, 63%, 41%) |
| OKLCH | oklch(49.1% 0.169 24.7) |
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 #AC272B | 6.81:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #AC272B | 3.07:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #AC272B text on white | 6.81:1 | AA | Lc 82.1 | Fine for body text |
| #AC272B text on black | 3.07:1 | AA large text | Lc -19.8 | 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 700.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F6CECA
oklch(88.4% 0.046 24.8)
-
Step 300
300
#F1ACA6
oklch(80.8% 0.082 24.6)
-
Step 400
400
#E77E77
oklch(70.8% 0.131 24.9)
-
Step 500
500
#DC5854
oklch(63.1% 0.167 24.8)
-
Step 600
600
#C83739
oklch(55.7% 0.182 24.7)
-
Step 700
700 (this color)
#AC272B
oklch(49.1% 0.169 24.7)
-
Step 800
800
#8C2325
oklch(42.7% 0.14 24.5)
-
Step 900
900
#702422
oklch(37.7% 0.108 25.3)
-
Step 950
950
#421615
oklch(27% 0.069 24.1)
#AC272B 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) | #50482A | 0.183 |
| Deuteranopia (no green cones) | #706526 | 0.168 |
| Tritanopia (no blue cones) | #BE002A | 0.039 |
| Achromatopsia (no color) | #5B5B5B | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC272B
#AC272B
oklch(49.1% 0.169 24.7)
- #006E77
#006E77
oklch(49.1% 0.084 204.7)
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 #AC272B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.014
- Brown #A52A2A ΔE 0.014
- Rufous #AE2012 ΔE 0.020
- Rust Red #AA2704 ΔE 0.028
- Rusty Red #AF2F0D ΔE 0.031
- Brick #A03623 ΔE 0.033
- Rouge #AB1239 ΔE 0.033
- Auburn #9B2226 ΔE 0.038
Use #AC272B 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.