#AC3D18
Closest named color: Rusty Red (#AF2F0D). oklch(51.2% 0.153 37.5), rgb(172, 61, 24).
Aa
White text reads best on this color (6.11:1).
About this color
#AC3D18 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.153 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.022 away. White text reads best on it, at 6.11:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #AC3D18 |
| RGB | rgb(172, 61, 24) |
| HSL | hsl(15, 76%, 38%) |
| OKLCH | oklch(51.2% 0.153 37.5) |
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 #AC3D18 | 6.11:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #AC3D18 | 3.43:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #AC3D18 text on white | 6.11:1 | AA | Lc 79.6 | Fine for body text |
| #AC3D18 text on black | 3.43:1 | AA large text | Lc -22.2 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C6
oklch(88.4% 0.042 36.5)
-
Step 300
300
#ECB19F
oklch(81% 0.074 37.6)
-
Step 400
400
#DF856A
oklch(70.7% 0.118 37.5)
-
Step 500
500
#D46340
oklch(63.1% 0.151 37.8)
-
Step 600
600
#BF461E
oklch(55.5% 0.164 37.6)
-
Step 700
700 (this color)
#AC3D18
oklch(51.2% 0.153 37.5)
-
Step 800
800
#862E11
oklch(42.7% 0.127 37.4)
-
Step 900
900
#6C2A16
oklch(37.7% 0.1 37.3)
-
Step 950
950
#3F1A0E
oklch(27% 0.062 38.5)
#AC3D18 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) | #5D5211 | 0.155 |
| Deuteranopia (no green cones) | #796B12 | 0.139 |
| Tritanopia (no blue cones) | #BE1D36 | 0.065 |
| Achromatopsia (no color) | #626262 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3D18
#AC3D18
oklch(51.2% 0.153 37.5)
- #007389
#007389
oklch(51.2% 0.092 217.2)
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 #AC3D18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.022
- Russet #A13905 ΔE 0.027
- Burnt Umber #A0450E ΔE 0.028
- Sinopia #BB3E03 ΔE 0.031
- Brick #A03623 ΔE 0.032
- Rust Red #AA2704 ΔE 0.035
- Cinnamon #AC4F06 ΔE 0.041
- Rufous #AE2012 ΔE 0.042
Use #AC3D18 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.