#AC241C
Closest named color: Rufous (#AE2012). oklch(48.7% 0.173 28.8), rgb(172, 36, 28).
Aa
White text reads best on this color (6.94:1).
About this color
#AC241C is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.173 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.007 away. White text reads best on it, at 6.94:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #AC241C |
| RGB | rgb(172, 36, 28) |
| HSL | hsl(3, 72%, 39%) |
| OKLCH | oklch(48.7% 0.173 28.8) |
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 #AC241C | 6.94:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #AC241C | 3.02:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #AC241C text on white | 6.94:1 | AA | Lc 82.5 | Fine for body text |
| #AC241C text on black | 3.02:1 | AA large text | Lc -19.4 | 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
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC8
oklch(88.5% 0.047 27.8)
-
Step 300
300
#F2ACA2
oklch(80.8% 0.084 28.1)
-
Step 400
400
#E87E6F
oklch(70.8% 0.134 29.3)
-
Step 500
500
#DE5749
oklch(63.1% 0.172 28.8)
-
Step 600
600
#C9362B
oklch(55.6% 0.186 28.8)
-
Step 700
700 (this color)
#AC241C
oklch(48.7% 0.173 28.8)
-
Step 800
800
#8D221B
oklch(42.7% 0.144 28.5)
-
Step 900
900
#71231C
oklch(37.6% 0.112 28.6)
-
Step 950
950
#431611
oklch(27.1% 0.071 28.9)
#AC241C 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) | #4F4719 | 0.187 |
| Deuteranopia (no green cones) | #716414 | 0.169 |
| Tritanopia (no blue cones) | #BE0024 | 0.040 |
| Achromatopsia (no color) | #5A5A5A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC241C
#AC241C
oklch(48.7% 0.173 28.8)
- #006C79
#006C79
oklch(48.6% 0.084 209.2)
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 #AC241C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.007
- Firebrick #B22222 ΔE 0.014
- Rust Red #AA2704 ΔE 0.016
- Brown #A52A2A ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.023
- Brick #A03623 ΔE 0.031
- Burnt Red #9F2305 ΔE 0.031
- Scarlet #BE0119 ΔE 0.038
Use #AC241C 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.