#AC1B2C
Closest named color: Brown (#A52A2A). oklch(48.2% 0.178 22), rgb(172, 27, 44).
Aa
White text reads best on this color (7.12:1).
About this color
#AC1B2C is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.178 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.021 away. White text reads best on it, at 7.12:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #AC1B2C |
| RGB | rgb(172, 27, 44) |
| HSL | hsl(353, 73%, 39%) |
| OKLCH | oklch(48.2% 0.178 22) |
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 #AC1B2C | 7.12:1 | AAA | Lc -88.0 | Fine for body text |
| Black text on #AC1B2C | 2.94:1 | Fails | Lc 21.1 | Dividers and decoration only |
| #AC1B2C text on white | 7.12:1 | AAA | Lc 83.0 | Fine for body text |
| #AC1B2C text on black | 2.94:1 | Fails | Lc -19.0 | 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
#F7CDCB
oklch(88.4% 0.048 21.3)
-
Step 300
300
#F3ABA8
oklch(80.9% 0.085 21.8)
-
Step 400
400
#EA7B79
oklch(70.8% 0.138 22.2)
-
Step 500
500
#E05357
oklch(63.2% 0.176 22)
-
Step 600
600
#CB2F3C
oklch(55.6% 0.191 22.1)
-
Step 700
700 (this color)
#AC1B2C
oklch(48.2% 0.178 22)
-
Step 800
800
#8E1E27
oklch(42.7% 0.147 22.2)
-
Step 900
900
#722024
oklch(37.6% 0.115 22)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#AC1B2C 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) | #4A442B | 0.196 |
| Deuteranopia (no green cones) | #6E6327 | 0.178 |
| Tritanopia (no blue cones) | #BE0023 | 0.036 |
| Achromatopsia (no color) | #585858 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC1B2C
#AC1B2C
oklch(48.2% 0.178 22)
- #006B72
#006B72
oklch(48.1% 0.082 202.7)
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 #AC1B2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.021
- Rouge #AB1239 ΔE 0.021
- Firebrick #B22222 ΔE 0.021
- Rufous #AE2012 ΔE 0.026
- Auburn #9B2226 ΔE 0.035
- Rust Red #AA2704 ΔE 0.037
- Scarlet #BE0119 ΔE 0.038
- Lipstick Red #C0022F ΔE 0.040
Use #AC1B2C 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.