#AC0424
Closest named color: Rouge (#AB1239). oklch(47.1% 0.188 22.4), rgb(172, 4, 36).
Aa
White text reads best on this color (7.50:1).
About this color
#AC0424 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.188 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.024 away. White text reads best on it, at 7.50:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #AC0424 |
| RGB | rgb(172, 4, 36) |
| HSL | hsl(349, 95%, 35%) |
| OKLCH | oklch(47.1% 0.188 22.4) |
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 #AC0424 | 7.50:1 | AAA | Lc -88.6 | Fine for body text |
| Black text on #AC0424 | 2.79:1 | Fails | Lc 20.4 | Dividers and decoration only |
| #AC0424 text on white | 7.50:1 | AAA | Lc 83.6 | Fine for body text |
| #AC0424 text on black | 2.79:1 | Fails | Lc -18.3 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F6A9A6
oklch(80.8% 0.091 21.8)
-
Step 400
400
#EE7876
oklch(70.8% 0.146 22.5)
-
Step 500
500
#E44E53
oklch(63.1% 0.186 22.4)
-
Step 600
600
#CF2637
oklch(55.5% 0.202 22.5)
-
Step 700
700 (this color)
#AC0424
oklch(47.1% 0.188 22.4)
-
Step 800
800
#911724
oklch(42.7% 0.155 22.2)
-
Step 900
900
#751D22
oklch(37.8% 0.122 22.3)
-
Step 950
950
#451314
oklch(27% 0.077 22.7)
#AC0424 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) | #463F23 | 0.208 |
| Deuteranopia (no green cones) | #6C601D | 0.189 |
| Tritanopia (no blue cones) | #BE0016 | 0.040 |
| Achromatopsia (no color) | #555555 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC0424
#AC0424
oklch(47.1% 0.188 22.4)
- #00686F
#00686F
oklch(47.1% 0.08 202.9)
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 #AC0424, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.024
- Firebrick #B22222 ΔE 0.030
- Rufous #AE2012 ΔE 0.031
- Brown #A52A2A ΔE 0.031
- Carmine #9D0216 ΔE 0.035
- Auburn #9B2226 ΔE 0.036
- Scarlet #BE0119 ΔE 0.039
- Rust Red #AA2704 ΔE 0.042
Use #AC0424 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.