#A64F21
Closest named color: Sienna (#A0522D). oklch(52.9% 0.129 45.5), rgb(166, 79, 33).
Aa
White text reads best on this color (5.58:1).
About this color
#A64F21 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 53%, its chroma 0.129 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Sienna (#A0522D), ΔE 0.014 away. White text reads best on it, at 5.58:1.
| Hue family | Browns |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Sienna (#A0522D) |
| Black text | 3.76:1 |
| White text | 5.58:1 |
Values
| HEX | #A64F21 |
| RGB | rgb(166, 79, 33) |
| HSL | hsl(21, 67%, 39%) |
| OKLCH | oklch(52.9% 0.129 45.5) |
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 #A64F21 | 5.58:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #A64F21 | 3.76:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #A64F21 text on white | 5.58:1 | AA | Lc 77.4 | Fine for body text |
| #A64F21 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E7E1
oklch(93.7% 0.016 46.6)
-
Step 200
200
#ECD3C8
oklch(88.5% 0.032 45.3)
-
Step 300
300
#E1B6A2
oklch(80.9% 0.057 46.3)
-
Step 400
400
#D18E6F
oklch(70.7% 0.093 45.6)
-
Step 500
500
#C37049
oklch(63% 0.118 45.2)
-
Step 600
600 (this color)
#A64F21
oklch(52.9% 0.129 45.5)
-
Step 700
700
#96471D
oklch(49.2% 0.119 45.6)
-
Step 800
800
#7A3B1A
oklch(42.8% 0.099 45.9)
-
Step 900
900
#62331C
oklch(37.7% 0.076 45.6)
-
Step 950
950
#3A1E11
oklch(27% 0.049 45)
#A64F21 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) | #685C1B | 0.117 |
| Deuteranopia (no green cones) | #7D6F1F | 0.106 |
| Tritanopia (no blue cones) | #B63C46 | 0.070 |
| Achromatopsia (no color) | #686868 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A64F21
#A64F21
oklch(52.9% 0.129 45.5)
- #007797
#007797
oklch(53% 0.1 225)
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 #A64F21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sienna #A0522D ΔE 0.014
- Cinnamon #AC4F06 ΔE 0.017
- Burnt Umber #A0450E ΔE 0.027
- Burnt Siena #B75203 ΔE 0.037
- Warm Brown #964E02 ΔE 0.037
- Sepia #985E2B ΔE 0.040
- Raw Umber #A75E09 ΔE 0.042
- Sinopia #BB3E03 ΔE 0.046
Use #A64F21 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.