#AC3742
Closest named color: Light Burgundy (#A8415B). oklch(51.1% 0.152 19.1), rgb(172, 55, 66).
Aa
White text reads best on this color (6.21:1).
About this color
#AC3742 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.152 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Light Burgundy (#A8415B), ΔE 0.035 away. White text reads best on it, at 6.21:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.152) |
| Temperature | warm |
| Nearest name | Light Burgundy (#A8415B) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #AC3742 |
| RGB | rgb(172, 55, 66) |
| HSL | hsl(354, 52%, 45%) |
| OKLCH | oklch(51.1% 0.152 19.1) |
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 #AC3742 | 6.21:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #AC3742 | 3.37:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #AC3742 text on white | 6.21:1 | AA | Lc 80.0 | Fine for body text |
| #AC3742 text on black | 3.37:1 | AA large text | Lc -21.8 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F8E5E4
oklch(93.7% 0.021 21.2)
-
Step 200
200
#F3CFCE
oklch(88.5% 0.041 19.8)
-
Step 300
300
#EDAEAE
oklch(80.9% 0.074 18.8)
-
Step 400
400
#E08183
oklch(70.6% 0.117 19.1)
-
Step 500
500
#D55E64
oklch(63.2% 0.15 19.4)
-
Step 600
600
#C0404C
oklch(55.6% 0.163 18.9)
-
Step 700
700 (this color)
#AC3742
oklch(51.1% 0.152 19.1)
-
Step 800
800
#862A32
oklch(42.7% 0.125 19.3)
-
Step 900
900
#6C272C
oklch(37.6% 0.098 18.9)
-
Step 950
950
#40181A
oklch(27.1% 0.063 19.2)
#AC3742 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) | #555142 | 0.166 |
| Deuteranopia (no green cones) | #736A3F | 0.153 |
| Tritanopia (no blue cones) | #BC1B3C | 0.040 |
| Achromatopsia (no color) | #616161 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC3742
#AC3742
oklch(51.1% 0.152 19.1)
- #007579
#007579
oklch(51.1% 0.087 199)
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 #AC3742, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Burgundy #A8415B ΔE 0.035
- Brown #A52A2A ΔE 0.036
- Dull Red #BB3F3F ΔE 0.037
- Light Maroon #A24857 ΔE 0.038
- Firebrick #B22222 ΔE 0.038
- Brick #A03623 ΔE 0.044
- Dusty Red #B9484E ΔE 0.045
- Rouge #AB1239 ΔE 0.045
Use #AC3742 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.