#AC312B
Closest named color: Firebrick (#B22222). oklch(50% 0.16 27.4), rgb(172, 49, 43).
Aa
White text reads best on this color (6.50:1).
About this color
#AC312B is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.160 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.020 away. White text reads best on it, at 6.50:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #AC312B |
| RGB | rgb(172, 49, 43) |
| HSL | hsl(3, 60%, 42%) |
| OKLCH | oklch(50% 0.16 27.4) |
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 #AC312B | 6.50:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #AC312B | 3.22:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #AC312B text on white | 6.50:1 | AA | Lc 81.1 | Fine for body text |
| #AC312B text on black | 3.22:1 | AA large text | Lc -20.8 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F5CFCA
oklch(88.5% 0.044 26.8)
-
Step 300
300
#EFAEA5
oklch(80.9% 0.078 27.8)
-
Step 400
400
#E48075
oklch(70.7% 0.125 27.3)
-
Step 500
500
#D95C52
oklch(63.1% 0.159 27.1)
-
Step 600
600
#C43D36
oklch(55.6% 0.173 27.2)
-
Step 700
700 (this color)
#AC312B
oklch(50% 0.16 27.4)
-
Step 800
800
#892823
oklch(42.7% 0.133 27.2)
-
Step 900
900
#6E2621
oklch(37.6% 0.104 27.1)
-
Step 950
950
#411814
oklch(27.1% 0.065 27.8)
#AC312B 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) | #554D29 | 0.171 |
| Deuteranopia (no green cones) | #736827 | 0.158 |
| Tritanopia (no blue cones) | #BD0031 | 0.049 |
| Achromatopsia (no color) | #5E5E5E | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC312B
#AC312B
oklch(50% 0.16 27.4)
- #00717C
#00717C
oklch(50.1% 0.086 206.6)
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 #AC312B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.020
- Brown #A52A2A ΔE 0.020
- Rusty Red #AF2F0D ΔE 0.022
- Rufous #AE2012 ΔE 0.025
- Brick #A03623 ΔE 0.026
- Rust Red #AA2704 ΔE 0.027
- Russet #A13905 ΔE 0.040
- Burnt Red #9F2305 ΔE 0.044
Use #AC312B 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.