#A64B39
Closest named color: Sienna (#A0522D). oklch(52.6% 0.124 32.8), rgb(166, 75, 57).
Aa
White text reads best on this color (5.69:1).
About this color
#A64B39 is a medium-dark, moderately saturated red. In OKLCH its lightness is 53%, its chroma 0.124 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.026 away. White text reads best on it, at 5.69:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.124) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #A64B39 |
| RGB | rgb(166, 75, 57) |
| HSL | hsl(10, 49%, 44%) |
| OKLCH | oklch(52.6% 0.124 32.8) |
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 #A64B39 | 5.69:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #A64B39 | 3.68:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #A64B39 text on white | 5.69:1 | AA | Lc 77.9 | Fine for body text |
| #A64B39 text on black | 3.68:1 | AA large text | Lc -23.8 | 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 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
#EDD2CC
oklch(88.5% 0.031 32.6)
-
Step 300
300
#E2B4AA
oklch(80.8% 0.056 32.4)
-
Step 400
400
#D28C7D
oklch(70.7% 0.089 32.6)
-
Step 500
500
#C56E5C
oklch(63.2% 0.114 32.7)
-
Step 600
600 (this color)
#A64B39
oklch(52.6% 0.124 32.8)
-
Step 700
700
#974433
oklch(49.1% 0.116 33.1)
-
Step 800
800
#7B382B
oklch(42.7% 0.097 32.5)
-
Step 900
900
#633127
oklch(37.6% 0.075 32.5)
-
Step 950
950
#3A1D17
oklch(26.9% 0.047 32.7)
#A64B39 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) | #635A37 | 0.125 |
| Deuteranopia (no green cones) | #796E37 | 0.116 |
| Tritanopia (no blue cones) | #B63A47 | 0.050 |
| Achromatopsia (no color) | #676767 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A64B39
#A64B39
oklch(52.6% 0.124 32.8)
- #00788A
#00788A
oklch(52.6% 0.092 212.8)
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 #A64B39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.026
- Burnt Umber #A0450E ΔE 0.038
- Cinnamon #AC4F06 ΔE 0.043
- Light Maroon #A24857 ΔE 0.045
- Dull Red #BB3F3F ΔE 0.045
- Brick #A03623 ΔE 0.046
- Dusty Red #B9484E ΔE 0.047
- Russet #A13905 ΔE 0.049
Use #A64B39 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.