#AC1329
Closest named color: Rouge (#AB1239). oklch(47.7% 0.182 22), rgb(172, 19, 41).
Aa
White text reads best on this color (7.29:1).
About this color
#AC1329 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.182 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.020 away. White text reads best on it, at 7.29:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.182) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.87:1 |
| White text | 7.29:1 |
Values
| HEX | #AC1329 |
| RGB | rgb(172, 19, 41) |
| HSL | hsl(351, 80%, 37%) |
| OKLCH | oklch(47.7% 0.182 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 #AC1329 | 7.29:1 | AAA | Lc -88.3 | Fine for body text |
| Black text on #AC1329 | 2.87:1 | Fails | Lc 20.7 | Dividers and decoration only |
| #AC1329 text on white | 7.29:1 | AAA | Lc 83.3 | Fine for body text |
| #AC1329 text on black | 2.87:1 | Fails | Lc -18.6 | 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
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F8CDCB
oklch(88.5% 0.049 21.2)
-
Step 300
300
#F5AAA7
oklch(80.9% 0.089 21.8)
-
Step 400
400
#EB7978
oklch(70.6% 0.141 21.8)
-
Step 500
500
#E25155
oklch(63.2% 0.18 22.3)
-
Step 600
600
#CD2B3B
oklch(55.6% 0.196 21.8)
-
Step 700
700 (this color)
#AC1329
oklch(47.7% 0.182 22)
-
Step 800
800
#901B26
oklch(42.8% 0.151 22.1)
-
Step 900
900
#731F23
oklch(37.6% 0.117 22.3)
-
Step 950
950
#441415
oklch(27% 0.074 22.3)
#AC1329 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) | #484228 | 0.202 |
| Deuteranopia (no green cones) | #6D6223 | 0.184 |
| Tritanopia (no blue cones) | #BE001E | 0.037 |
| Achromatopsia (no color) | #565656 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC1329
#AC1329
oklch(47.7% 0.182 22)
- #006A70
#006A70
oklch(47.7% 0.081 201.6)
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 #AC1329, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.020
- Firebrick #B22222 ΔE 0.025
- Brown #A52A2A ΔE 0.025
- Rufous #AE2012 ΔE 0.028
- Auburn #9B2226 ΔE 0.035
- Scarlet #BE0119 ΔE 0.038
- Rust Red #AA2704 ΔE 0.039
- Carmine #9D0216 ΔE 0.040
Use #AC1329 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.