#A64B33
Closest named color: Sienna (#A0522D). oklch(52.5% 0.126 35.8), rgb(166, 75, 51).
Aa
White text reads best on this color (5.71:1).
About this color
#A64B33 is a medium-dark, moderately saturated red. In OKLCH its lightness is 53%, its chroma 0.126 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.022 away. White text reads best on it, at 5.71:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.126) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #A64B33 |
| RGB | rgb(166, 75, 51) |
| HSL | hsl(13, 53%, 43%) |
| OKLCH | oklch(52.5% 0.126 35.8) |
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 #A64B33 | 5.71:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #A64B33 | 3.67:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #A64B33 text on white | 5.71:1 | AA | Lc 78.0 | Fine for body text |
| #A64B33 text on black | 3.67:1 | 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
#F4E6E2
oklch(93.5% 0.016 36.5)
-
Step 200
200
#EDD2CB
oklch(88.4% 0.032 34.9)
-
Step 300
300
#E2B4A8
oklch(80.8% 0.056 35)
-
Step 400
400
#D28C79
oklch(70.6% 0.091 35.9)
-
Step 500
500
#C56E57
oklch(63.1% 0.116 35.7)
-
Step 600
600 (this color)
#A64B33
oklch(52.5% 0.126 35.8)
-
Step 700
700
#97442E
oklch(49% 0.117 35.9)
-
Step 800
800
#7B3927
oklch(42.8% 0.097 36.2)
-
Step 900
900
#633124
oklch(37.6% 0.076 35.6)
-
Step 950
950
#3A1D16
oklch(26.9% 0.048 34.5)
#A64B33 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) | #635A30 | 0.126 |
| Deuteranopia (no green cones) | #7A6E31 | 0.115 |
| Tritanopia (no blue cones) | #B63946 | 0.055 |
| Achromatopsia (no color) | #666666 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A64B33
#A64B33
oklch(52.5% 0.126 35.8)
- #00778C
#00778C
oklch(52.4% 0.093 215.7)
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 #A64B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.022
- Burnt Umber #A0450E ΔE 0.033
- Cinnamon #AC4F06 ΔE 0.037
- Russet #A13905 ΔE 0.045
- Brick #A03623 ΔE 0.045
- Sinopia #BB3E03 ΔE 0.047
- Dull Red #BB3F3F ΔE 0.048
- Rusty Red #AF2F0D ΔE 0.050
Use #A64B33 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.