#AC2E17
Closest named color: Rusty Red (#AF2F0D). oklch(49.5% 0.166 32.5), rgb(172, 46, 23).
Aa
White text reads best on this color (6.65:1).
About this color
#AC2E17 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.166 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.009 away. White text reads best on it, at 6.65:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #AC2E17 |
| RGB | rgb(172, 46, 23) |
| HSL | hsl(9, 76%, 38%) |
| OKLCH | oklch(49.5% 0.166 32.5) |
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 #AC2E17 | 6.65:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #AC2E17 | 3.15:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #AC2E17 text on white | 6.65:1 | AA | Lc 81.6 | Fine for body text |
| #AC2E17 text on black | 3.15:1 | AA large text | Lc -20.3 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#F0AEA0
oklch(80.9% 0.081 32.3)
-
Step 400
400
#E5806C
oklch(70.6% 0.129 32.3)
-
Step 500
500
#DA5C44
oklch(63.1% 0.163 32.6)
-
Step 600
600
#C63C23
oklch(55.6% 0.179 32.5)
-
Step 700
700 (this color)
#AC2E17
oklch(49.5% 0.166 32.5)
-
Step 800
800
#8A2715
oklch(42.6% 0.137 32.6)
-
Step 900
900
#6F2618
oklch(37.6% 0.107 32.9)
-
Step 950
950
#42170F
oklch(27% 0.069 32.4)
#AC2E17 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) | #554B12 | 0.174 |
| Deuteranopia (no green cones) | #74670F | 0.159 |
| Tritanopia (no blue cones) | #BE002A | 0.052 |
| Achromatopsia (no color) | #5C5C5C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC2E17
#AC2E17
oklch(49.5% 0.166 32.5)
- #006E7F
#006E7F
oklch(49.5% 0.087 213.1)
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 #AC2E17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.009
- Rust Red #AA2704 ΔE 0.013
- Rufous #AE2012 ΔE 0.017
- Firebrick #B22222 ΔE 0.022
- Brick #A03623 ΔE 0.024
- Brown #A52A2A ΔE 0.025
- Russet #A13905 ΔE 0.030
- Burnt Red #9F2305 ΔE 0.035
Use #AC2E17 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.