#AC5740
Closest named color: Sienna (#A0522D). oklch(55.5% 0.117 36.1), rgb(172, 87, 64).
Aa
White text reads best on this color (5.01:1).
About this color
#AC5740 is a medium-dark, moderately saturated red. In OKLCH its lightness is 55%, its chroma 0.117 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.033 away. White text reads best on it, at 5.01:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.117) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 4.19:1 |
| White text | 5.01:1 |
Values
| HEX | #AC5740 |
| RGB | rgb(172, 87, 64) |
| HSL | hsl(13, 46%, 46%) |
| OKLCH | oklch(55.5% 0.117 36.1) |
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 #AC5740 | 5.01:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #AC5740 | 4.19:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #AC5740 text on white | 5.01:1 | AA | Lc 74.2 | Content text, not long reading |
| #AC5740 text on black | 4.19:1 | AA large text | Lc -27.5 | 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 600.
-
Step 50
50
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F4E7E3
oklch(93.7% 0.015 37.9)
-
Step 200
200
#ECD3CC
oklch(88.6% 0.03 36.2)
-
Step 300
300
#E0B5A9
oklch(80.8% 0.053 36.1)
-
Step 400
400
#CF8E7C
oklch(70.7% 0.084 36.1)
-
Step 500
500
#C1715B
oklch(63.2% 0.107 36.2)
-
Step 600
600 (this color)
#AC5740
oklch(55.5% 0.117 36.1)
-
Step 700
700
#944732
oklch(49.1% 0.109 36.2)
-
Step 800
800
#783B2A
oklch(42.7% 0.09 36.5)
-
Step 900
900
#613326
oklch(37.7% 0.07 36.6)
-
Step 950
950
#391E17
oklch(27% 0.044 35.4)
#AC5740 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) | #6D643E | 0.115 |
| Deuteranopia (no green cones) | #82763E | 0.105 |
| Tritanopia (no blue cones) | #BC4852 | 0.053 |
| Achromatopsia (no color) | #6F6F6F | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC5740
#AC5740
oklch(55.5% 0.117 36.1)
- #008198
#008198
oklch(55.6% 0.099 216.1)
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 #AC5740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.033
- Earth #A2653E ΔE 0.038
- Cinnamon #AC4F06 ΔE 0.042
- Burnt Siena #B75203 ΔE 0.044
- Dusty Red #B9484E ΔE 0.047
- Copper #B66325 ΔE 0.049
- Sepia #985E2B ΔE 0.050
- Clay #B66A50 ΔE 0.050
Use #AC5740 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.