#AC2B22
Closest named color: Firebrick (#B22222). oklch(49.3% 0.167 28.7), rgb(172, 43, 34).
Aa
White text reads best on this color (6.72:1).
About this color
#AC2B22 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.167 and its hue 29°. 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 6.72:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #AC2B22 |
| RGB | rgb(172, 43, 34) |
| HSL | hsl(4, 67%, 40%) |
| OKLCH | oklch(49.3% 0.167 28.7) |
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 #AC2B22 | 6.72:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #AC2B22 | 3.12:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #AC2B22 text on white | 6.72:1 | AA | Lc 81.8 | Fine for body text |
| #AC2B22 text on black | 3.12:1 | AA large text | Lc -20.1 | 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
#F9E4E1
oklch(93.5% 0.023 27.3)
-
Step 200
200
#F6CFC8
oklch(88.6% 0.045 29.9)
-
Step 300
300
#F0ADA3
oklch(80.8% 0.081 28.5)
-
Step 400
400
#E67F71
oklch(70.7% 0.13 28.9)
-
Step 500
500
#DB5A4C
oklch(63.1% 0.165 28.8)
-
Step 600
600
#C73A2F
oklch(55.7% 0.18 28.7)
-
Step 700
700 (this color)
#AC2B22
oklch(49.3% 0.167 28.7)
-
Step 800
800
#8B251D
oklch(42.6% 0.139 28.8)
-
Step 900
900
#70251E
oklch(37.8% 0.108 28.5)
-
Step 950
950
#421712
oklch(27.1% 0.068 29)
#AC2B22 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) | #524A1F | 0.179 |
| Deuteranopia (no green cones) | #72661C | 0.163 |
| Tritanopia (no blue cones) | #BE002A | 0.045 |
| Achromatopsia (no color) | #5C5C5C | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2B22
#AC2B22
oklch(49.3% 0.167 28.7)
- #006E7B
#006E7B
oklch(49.3% 0.085 209)
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 #AC2B22, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.014
- Rufous #AE2012 ΔE 0.014
- Brown #A52A2A ΔE 0.017
- Rust Red #AA2704 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.019
- Brick #A03623 ΔE 0.026
- Burnt Red #9F2305 ΔE 0.036
- Russet #A13905 ΔE 0.038
Use #AC2B22 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.