#AC5540
Closest named color: Sienna (#A0522D). oklch(55.2% 0.119 34.7), rgb(172, 85, 64).
Aa
White text reads best on this color (5.08:1).
About this color
#AC5540 is a medium-dark, moderately saturated red. In OKLCH its lightness is 55%, its chroma 0.119 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.032 away. White text reads best on it, at 5.08:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.119) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #AC5540 |
| RGB | rgb(172, 85, 64) |
| HSL | hsl(12, 46%, 46%) |
| OKLCH | oklch(55.2% 0.119 34.7) |
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 #AC5540 | 5.08:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #AC5540 | 4.12:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #AC5540 text on white | 5.08:1 | AA | Lc 74.7 | Content text, not long reading |
| #AC5540 text on black | 4.12:1 | AA large text | Lc -27.0 | 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 600.
-
Step 50
50
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F4E6E3
oklch(93.5% 0.016 32)
-
Step 200
200
#ECD3CC
oklch(88.6% 0.03 36.2)
-
Step 300
300
#E1B5AA
oklch(80.9% 0.054 34.4)
-
Step 400
400
#D08D7D
oklch(70.6% 0.086 34)
-
Step 500
500
#C2705B
oklch(63.1% 0.109 35.3)
-
Step 600
600 (this color)
#AC5540
oklch(55.2% 0.119 34.7)
-
Step 700
700
#954633
oklch(49.1% 0.111 34.7)
-
Step 800
800
#793A2B
oklch(42.7% 0.092 34.6)
-
Step 900
900
#623227
oklch(37.7% 0.072 34)
-
Step 950
950
#391E17
oklch(27% 0.044 35.4)
#AC5540 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) | #6B633E | 0.119 |
| Deuteranopia (no green cones) | #81753E | 0.108 |
| Tritanopia (no blue cones) | #BC4550 | 0.052 |
| Achromatopsia (no color) | #6E6E6E | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC5540
#AC5540
oklch(55.2% 0.119 34.7)
- #008095
#008095
oklch(55.2% 0.097 214.5)
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 #AC5540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.032
- Cinnamon #AC4F06 ΔE 0.042
- Earth #A2653E ΔE 0.042
- Dusty Red #B9484E ΔE 0.043
- Burnt Siena #B75203 ΔE 0.045
- Dull Red #BB3F3F ΔE 0.049
- Brick Orange #C14A09 ΔE 0.051
- Burnt Orange #C04E01 ΔE 0.052
Use #AC5540 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.