#AC1E1F
Closest named color: Rufous (#AE2012). oklch(48.2% 0.177 26.8), rgb(172, 30, 31).
Aa
White text reads best on this color (7.09:1).
About this color
#AC1E1F is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.177 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.012 away. White text reads best on it, at 7.09:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.95:1 |
| White text | 7.09:1 |
Values
| HEX | #AC1E1F |
| RGB | rgb(172, 30, 31) |
| HSL | hsl(360, 70%, 40%) |
| OKLCH | oklch(48.2% 0.177 26.8) |
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 #AC1E1F | 7.09:1 | AAA | Lc -87.9 | Fine for body text |
| Black text on #AC1E1F | 2.95:1 | Fails | Lc 21.1 | Dividers and decoration only |
| #AC1E1F text on white | 7.09:1 | AAA | Lc 82.9 | Fine for body text |
| #AC1E1F text on black | 2.95:1 | Fails | Lc -19.0 | 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
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC8
oklch(88.5% 0.047 27.8)
-
Step 300
300
#F3ACA3
oklch(80.9% 0.085 27.2)
-
Step 400
400
#EA7C71
oklch(70.7% 0.138 27)
-
Step 500
500
#E0554C
oklch(63.2% 0.175 27)
-
Step 600
600
#CB322F
oklch(55.6% 0.19 26.8)
-
Step 700
700 (this color)
#AC1E1F
oklch(48.2% 0.177 26.8)
-
Step 800
800
#8E201E
oklch(42.7% 0.146 26.8)
-
Step 900
900
#72221E
oklch(37.7% 0.113 26.9)
-
Step 950
950
#431512
oklch(26.9% 0.072 26.7)
#AC1E1F 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) | #4D451D | 0.192 |
| Deuteranopia (no green cones) | #6F6318 | 0.175 |
| Tritanopia (no blue cones) | #BE0021 | 0.037 |
| Achromatopsia (no color) | #585858 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC1E1F
#AC1E1F
oklch(48.2% 0.177 26.8)
- #006B76
#006B76
oklch(48.2% 0.083 207.2)
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 #AC1E1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.012
- Firebrick #B22222 ΔE 0.015
- Brown #A52A2A ΔE 0.018
- Rust Red #AA2704 ΔE 0.022
- Rusty Red #AF2F0D ΔE 0.031
- Burnt Red #9F2305 ΔE 0.033
- Auburn #9B2226 ΔE 0.035
- Rouge #AB1239 ΔE 0.036
Use #AC1E1F 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.