#AC2729
Closest named color: Firebrick (#B22222). oklch(49% 0.169 25.4), rgb(172, 39, 41).
Aa
White text reads best on this color (6.82:1).
About this color
#AC2729 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.169 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.013 away. White text reads best on it, at 6.82:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #AC2729 |
| RGB | rgb(172, 39, 41) |
| HSL | hsl(359, 63%, 41%) |
| OKLCH | oklch(49% 0.169 25.4) |
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 #AC2729 | 6.82:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #AC2729 | 3.07:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #AC2729 text on white | 6.82:1 | AA | Lc 82.1 | Fine for body text |
| #AC2729 text on black | 3.07:1 | AA large text | Lc -19.8 | 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
#F6CECA
oklch(88.4% 0.046 24.8)
-
Step 300
300
#F1ACA6
oklch(80.8% 0.082 24.6)
-
Step 400
400
#E77E76
oklch(70.8% 0.131 25.5)
-
Step 500
500
#DC5852
oklch(63.1% 0.167 25.6)
-
Step 600
600
#C83737
oklch(55.7% 0.182 25.4)
-
Step 700
700 (this color)
#AC2729
oklch(49% 0.169 25.4)
-
Step 800
800
#8C2323
oklch(42.7% 0.141 25.5)
-
Step 900
900
#702421
oklch(37.7% 0.108 26)
-
Step 950
950
#421614
oklch(26.9% 0.069 25.4)
#AC2729 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) | #504827 | 0.183 |
| Deuteranopia (no green cones) | #716524 | 0.167 |
| Tritanopia (no blue cones) | #BE002A | 0.040 |
| Achromatopsia (no color) | #5B5B5B | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2729
#AC2729
oklch(49% 0.169 25.4)
- #006E77
#006E77
oklch(49.1% 0.084 204.7)
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 #AC2729, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.013
- Brown #A52A2A ΔE 0.014
- Rufous #AE2012 ΔE 0.018
- Rust Red #AA2704 ΔE 0.026
- Rusty Red #AF2F0D ΔE 0.029
- Brick #A03623 ΔE 0.032
- Rouge #AB1239 ΔE 0.035
- Scarlet #BE0119 ΔE 0.038
Use #AC2729 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.