#A63F2B
Closest named color: Brick (#A03623). oklch(50.7% 0.14 32.9), rgb(166, 63, 43).
Aa
White text reads best on this color (6.23:1).
About this color
#A63F2B is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.140 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.023 away. White text reads best on it, at 6.23:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.140) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.36:1 |
| White text | 6.23:1 |
Values
| HEX | #A63F2B |
| RGB | rgb(166, 63, 43) |
| HSL | hsl(10, 59%, 41%) |
| OKLCH | oklch(50.7% 0.14 32.9) |
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 #A63F2B | 6.23:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #A63F2B | 3.36:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #A63F2B text on white | 6.23:1 | AA | Lc 80.3 | Fine for body text |
| #A63F2B text on black | 3.36:1 | AA large text | Lc -21.5 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F1D1C9
oklch(88.5% 0.038 34.3)
-
Step 300
300
#E9B1A5
oklch(80.9% 0.068 32.3)
-
Step 400
400
#DC8774
oklch(70.8% 0.109 33.4)
-
Step 500
500
#D06650
oklch(63.2% 0.139 33.1)
-
Step 600
600
#BB4A34
oklch(55.6% 0.151 32.9)
-
Step 700
700 (this color)
#A63F2B
oklch(50.7% 0.14 32.9)
-
Step 800
800
#833121
oklch(42.8% 0.117 32.9)
-
Step 900
900
#692C20
oklch(37.6% 0.091 32.8)
-
Step 950
950
#3E1B13
oklch(27.1% 0.057 34.1)
#A63F2B 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) | #5B5228 | 0.145 |
| Deuteranopia (no green cones) | #756928 | 0.132 |
| Tritanopia (no blue cones) | #B6273B | 0.053 |
| Achromatopsia (no color) | #616161 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63F2B
#A63F2B
oklch(50.7% 0.14 32.9)
- #007283
#007283
oklch(50.7% 0.089 212.6)
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 #A63F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.023
- Russet #A13905 ΔE 0.028
- Rusty Red #AF2F0D ΔE 0.030
- Burnt Umber #A0450E ΔE 0.031
- Brown #A52A2A ΔE 0.038
- Rust Red #AA2704 ΔE 0.039
- Sienna #A0522D ΔE 0.041
- Firebrick #B22222 ΔE 0.044
Use #A63F2B 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.