#AC3723
Closest named color: Rusty Red (#AF2F0D). oklch(50.6% 0.156 32.2), rgb(172, 55, 35).
Aa
White text reads best on this color (6.31:1).
About this color
#AC3723 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.156 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.016 away. White text reads best on it, at 6.31:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.156) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #AC3723 |
| RGB | rgb(172, 55, 35) |
| HSL | hsl(9, 66%, 41%) |
| OKLCH | oklch(50.6% 0.156 32.2) |
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 #AC3723 | 6.31:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #AC3723 | 3.32:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #AC3723 text on white | 6.31:1 | AA | Lc 80.4 | Fine for body text |
| #AC3723 text on black | 3.32:1 | AA large text | Lc -21.4 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C8
oklch(88.6% 0.042 32.6)
-
Step 300
300
#EDAFA2
oklch(80.8% 0.075 32.1)
-
Step 400
400
#E28370
oklch(70.8% 0.121 32.2)
-
Step 500
500
#D65F4A
oklch(63% 0.155 31.8)
-
Step 600
600
#C2422C
oklch(55.7% 0.168 32.2)
-
Step 700
700 (this color)
#AC3723
oklch(50.6% 0.156 32.2)
-
Step 800
800
#882B1B
oklch(42.8% 0.13 32.2)
-
Step 900
900
#6D281C
oklch(37.6% 0.101 32)
-
Step 950
950
#401911
oklch(27% 0.063 33.1)
#AC3723 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) | #594F20 | 0.163 |
| Deuteranopia (no green cones) | #76691E | 0.148 |
| Tritanopia (no blue cones) | #BE1133 | 0.056 |
| Achromatopsia (no color) | #606060 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3723
#AC3723
oklch(50.6% 0.156 32.2)
- #007282
#007282
oklch(50.7% 0.088 211.6)
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 #AC3723, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.016
- Brick #A03623 ΔE 0.025
- Rust Red #AA2704 ΔE 0.027
- Firebrick #B22222 ΔE 0.030
- Russet #A13905 ΔE 0.030
- Rufous #AE2012 ΔE 0.030
- Brown #A52A2A ΔE 0.031
- Burnt Umber #A0450E ΔE 0.040
Use #AC3723 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.