#A64E37
Closest named color: Sienna (#A0522D). oklch(53% 0.122 35.7), rgb(166, 78, 55).
Aa
White text reads best on this color (5.57:1).
About this color
#A64E37 is a medium-dark, moderately saturated red. In OKLCH its lightness is 53%, its chroma 0.122 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.020 away. White text reads best on it, at 5.57:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.122) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #A64E37 |
| RGB | rgb(166, 78, 55) |
| HSL | hsl(12, 50%, 43%) |
| OKLCH | oklch(53% 0.122 35.7) |
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 #A64E37 | 5.57:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #A64E37 | 3.76:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #A64E37 text on white | 5.57:1 | AA | Lc 77.4 | Fine for body text |
| #A64E37 text on black | 3.76:1 | AA large text | Lc -24.4 | 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
#E1B5A9
oklch(80.9% 0.054 35.7)
-
Step 400
400
#D18D7B
oklch(70.7% 0.088 35.5)
-
Step 500
500
#C36F59
oklch(63.1% 0.112 35.6)
-
Step 600
600 (this color)
#A64E37
oklch(53% 0.122 35.7)
-
Step 700
700
#964530
oklch(49.1% 0.114 35.6)
-
Step 800
800
#7A3A29
oklch(42.8% 0.094 35.9)
-
Step 900
900
#623225
oklch(37.6% 0.073 36.1)
-
Step 950
950
#3A1E16
oklch(27.1% 0.046 36.8)
#A64E37 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) | #655C35 | 0.121 |
| Deuteranopia (no green cones) | #7B6F35 | 0.111 |
| Tritanopia (no blue cones) | #B63D49 | 0.054 |
| Achromatopsia (no color) | #686868 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A64E37
#A64E37
oklch(53% 0.122 35.7)
- #00798E
#00798E
oklch(53% 0.094 215.4)
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 #A64E37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.020
- Cinnamon #AC4F06 ΔE 0.037
- Burnt Umber #A0450E ΔE 0.037
- Dull Red #BB3F3F ΔE 0.049
- Burnt Siena #B75203 ΔE 0.050
- Sinopia #BB3E03 ΔE 0.050
- Dusty Red #B9484E ΔE 0.050
- Sepia #985E2B ΔE 0.050
Use #A64E37 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.