#AC1D00
Closest named color: Rufous (#AE2012). oklch(48% 0.181 32.3), rgb(172, 29, 0).
Aa
White text reads best on this color (7.16:1).
About this color
#AC1D00 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.181 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.009 away. White text reads best on it, at 7.16:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.92:1 |
| White text | 7.16:1 |
Values
| HEX | #AC1D00 |
| RGB | rgb(172, 29, 0) |
| HSL | hsl(10, 100%, 34%) |
| OKLCH | oklch(48% 0.181 32.3) |
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 #AC1D00 | 7.16:1 | AAA | Lc -88.1 | Fine for body text |
| Black text on #AC1D00 | 2.92:1 | Fails | Lc 21.0 | Dividers and decoration only |
| #AC1D00 text on white | 7.16:1 | AAA | Lc 83.0 | Fine for body text |
| #AC1D00 text on black | 2.92:1 | Fails | Lc -18.9 | 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
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F8CEC5
oklch(88.5% 0.049 32.1)
-
Step 300
300
#F4AC9D
oklch(80.9% 0.088 32.1)
-
Step 400
400
#EA7D67
oklch(70.7% 0.139 32.6)
-
Step 500
500
#E0553D
oklch(63% 0.178 32.1)
-
Step 600
600
#CC3217
oklch(55.6% 0.194 32.2)
-
Step 700
700 (this color)
#AC1D00
oklch(48% 0.181 32.3)
-
Step 800
800
#8F200C
oklch(42.7% 0.15 32.3)
-
Step 900
900
#732214
oklch(37.8% 0.117 32.2)
-
Step 950
950
#44150D
oklch(27% 0.075 31.9)
#AC1D00 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) | #4E4300 | 0.192 |
| Deuteranopia (no green cones) | #706300 | 0.172 |
| Tritanopia (no blue cones) | #BE001A | 0.041 |
| Achromatopsia (no color) | #585858 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC1D00
#AC1D00
oklch(48% 0.181 32.3)
- #006A79
#006A79
oklch(48.1% 0.084 211.6)
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 #AC1D00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.009
- Rust Red #AA2704 ΔE 0.011
- Firebrick #B22222 ΔE 0.024
- Rusty Red #AF2F0D ΔE 0.025
- Burnt Red #9F2305 ΔE 0.026
- Brown #A52A2A ΔE 0.029
- Brick #A03623 ΔE 0.036
- Scarlet #BE0119 ΔE 0.041
Use #AC1D00 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.