#A64728
Closest named color: Burnt Umber (#A0450E). oklch(51.8% 0.133 38.2), rgb(166, 71, 40).
Aa
White text reads best on this color (5.90:1).
About this color
#A64728 is a medium-dark, moderately saturated red. In OKLCH its lightness is 52%, its chroma 0.133 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Umber (#A0450E), ΔE 0.023 away. White text reads best on it, at 5.90:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.133) |
| Temperature | warm |
| Nearest name | Burnt Umber (#A0450E) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #A64728 |
| RGB | rgb(166, 71, 40) |
| HSL | hsl(15, 61%, 40%) |
| OKLCH | oklch(51.8% 0.133 38.2) |
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 #A64728 | 5.90:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #A64728 | 3.55:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #A64728 text on white | 5.90:1 | AA | Lc 78.9 | Fine for body text |
| #A64728 text on black | 3.55:1 | AA large text | Lc -22.9 | 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 700.
-
Step 50
50
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6E1
oklch(93.6% 0.019 38.1)
-
Step 200
200
#EFD2C8
oklch(88.5% 0.035 40)
-
Step 300
300
#E6B3A3
oklch(80.9% 0.064 38.1)
-
Step 400
400
#D88971
oklch(70.6% 0.103 37.7)
-
Step 500
500
#CC6A4B
oklch(63.2% 0.132 38.2)
-
Step 600
600
#B74F2D
oklch(55.6% 0.143 38.2)
-
Step 700
700 (this color)
#A64728
oklch(51.8% 0.133 38.2)
-
Step 800
800
#80351C
oklch(42.8% 0.111 38.5)
-
Step 900
900
#672F1D
oklch(37.7% 0.086 38.4)
-
Step 950
950
#3D1C12
oklch(27.1% 0.055 37.6)
#A64728 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) | #615724 | 0.132 |
| Deuteranopia (no green cones) | #786C25 | 0.121 |
| Tritanopia (no blue cones) | #B63240 | 0.060 |
| Achromatopsia (no color) | #646464 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A64728
#A64728
oklch(51.8% 0.133 38.2)
- #00748C
#00748C
oklch(51.6% 0.093 218.9)
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 #A64728, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Umber #A0450E ΔE 0.023
- Sienna #A0522D ΔE 0.025
- Cinnamon #AC4F06 ΔE 0.033
- Russet #A13905 ΔE 0.034
- Brick #A03623 ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.041
- Sinopia #BB3E03 ΔE 0.042
- Warm Brown #964E02 ΔE 0.045
Use #A64728 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.