#AC1017
Closest named color: Rufous (#AE2012). oklch(47.4% 0.185 26.9), rgb(172, 16, 23).
Aa
White text reads best on this color (7.39:1).
About this color
#AC1017 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.185 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.017 away. White text reads best on it, at 7.39:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.84:1 |
| White text | 7.39:1 |
Values
| HEX | #AC1017 |
| RGB | rgb(172, 16, 23) |
| HSL | hsl(357, 83%, 37%) |
| OKLCH | oklch(47.4% 0.185 26.9) |
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 #AC1017 | 7.39:1 | AAA | Lc -88.5 | Fine for body text |
| Black text on #AC1017 | 2.84:1 | Fails | Lc 20.5 | Dividers and decoration only |
| #AC1017 text on white | 7.39:1 | AAA | Lc 83.6 | Fine for body text |
| #AC1017 text on black | 2.84:1 | Fails | Lc -18.4 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC8
oklch(88.5% 0.05 25.7)
-
Step 300
300
#F5ABA2
oklch(81% 0.089 26.9)
-
Step 400
400
#EC7A6F
oklch(70.7% 0.143 27)
-
Step 500
500
#E35149
oklch(63.2% 0.183 26.8)
-
Step 600
600
#CE2B2A
oklch(55.5% 0.199 26.9)
-
Step 700
700 (this color)
#AC1017
oklch(47.4% 0.185 26.9)
-
Step 800
800
#901B1A
oklch(42.6% 0.153 27)
-
Step 900
900
#741F1B
oklch(37.7% 0.119 27.2)
-
Step 950
950
#441411
oklch(26.9% 0.075 26.9)
#AC1017 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) | #494114 | 0.203 |
| Deuteranopia (no green cones) | #6D610C | 0.184 |
| Tritanopia (no blue cones) | #BE0016 | 0.036 |
| Achromatopsia (no color) | #565656 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC1017
#AC1017
oklch(47.4% 0.185 26.9)
- #006873
#006873
oklch(47.3% 0.081 207.5)
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 #AC1017, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.017
- Firebrick #B22222 ΔE 0.023
- Brown #A52A2A ΔE 0.027
- Rust Red #AA2704 ΔE 0.028
- Burnt Red #9F2305 ΔE 0.032
- Auburn #9B2226 ΔE 0.035
- Carmine #9D0216 ΔE 0.036
- Rouge #AB1239 ΔE 0.036
Use #AC1017 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.