#AC4E39
Closest named color: Sienna (#A0522D). oklch(54% 0.128 34), rgb(172, 78, 57).
Aa
White text reads best on this color (5.38:1).
About this color
#AC4E39 is a medium-dark, moderately saturated red. In OKLCH its lightness is 54%, its chroma 0.128 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.029 away. White text reads best on it, at 5.38:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.128) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.90:1 |
| White text | 5.38:1 |
Values
| HEX | #AC4E39 |
| RGB | rgb(172, 78, 57) |
| HSL | hsl(11, 50%, 45%) |
| OKLCH | oklch(54% 0.128 34) |
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 #AC4E39 | 5.38:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #AC4E39 | 3.90:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #AC4E39 text on white | 5.38:1 | AA | Lc 76.2 | Fine for body text |
| #AC4E39 text on black | 3.90:1 | AA large text | Lc -25.5 | 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
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F5E6E3
oklch(93.6% 0.017 31.1)
-
Step 200
200
#EDD2CB
oklch(88.4% 0.032 34.9)
-
Step 300
300
#E3B4A8
oklch(80.9% 0.058 34.7)
-
Step 400
400
#D48B7A
oklch(70.7% 0.093 33.7)
-
Step 500
500
#C66D58
oklch(63.1% 0.118 34.3)
-
Step 600
600 (this color)
#AC4E39
oklch(54% 0.128 34)
-
Step 700
700
#984330
oklch(49.1% 0.119 34)
-
Step 800
800
#7C3828
oklch(42.8% 0.099 34.5)
-
Step 900
900
#643125
oklch(37.8% 0.077 34.4)
-
Step 950
950
#3B1D16
oklch(27% 0.049 34.1)
#AC4E39 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) | #675E37 | 0.128 |
| Deuteranopia (no green cones) | #7E7237 | 0.118 |
| Tritanopia (no blue cones) | #BC3C49 | 0.052 |
| Achromatopsia (no color) | #6A6A6A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC4E39
#AC4E39
oklch(54% 0.128 34)
- #007C90
#007C90
oklch(53.9% 0.095 214.1)
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 #AC4E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.029
- Cinnamon #AC4F06 ΔE 0.038
- Dull Red #BB3F3F ΔE 0.040
- Dusty Red #B9484E ΔE 0.041
- Sinopia #BB3E03 ΔE 0.044
- Burnt Siena #B75203 ΔE 0.045
- Burnt Umber #A0450E ΔE 0.046
- Brick Orange #C14A09 ΔE 0.049
Use #AC4E39 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.