#A63C2C
Closest named color: Brick (#A03623). oklch(50.3% 0.143 31.1), rgb(166, 60, 44).
Aa
White text reads best on this color (6.35:1).
About this color
#A63C2C is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.143 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.019 away. White text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.143) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #A63C2C |
| RGB | rgb(166, 60, 44) |
| HSL | hsl(8, 58%, 41%) |
| OKLCH | oklch(50.3% 0.143 31.1) |
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 #A63C2C | 6.35:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #A63C2C | 3.30:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #A63C2C text on white | 6.35:1 | AA | Lc 80.8 | Fine for body text |
| #A63C2C text on black | 3.30:1 | AA large text | Lc -21.1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EAB1A6
oklch(81% 0.069 31)
-
Step 400
400
#DD8676
oklch(70.8% 0.11 31.2)
-
Step 500
500
#D16452
oklch(63.1% 0.142 31)
-
Step 600
600
#BC4836
oklch(55.6% 0.153 31.2)
-
Step 700
700 (this color)
#A63C2C
oklch(50.3% 0.143 31.1)
-
Step 800
800
#843023
oklch(42.8% 0.119 31.2)
-
Step 900
900
#6A2B21
oklch(37.6% 0.093 31)
-
Step 950
950
#3E1A14
oklch(26.9% 0.058 31)
#A63C2C 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) | #59512A | 0.149 |
| Deuteranopia (no green cones) | #746829 | 0.136 |
| Tritanopia (no blue cones) | #B72239 | 0.052 |
| Achromatopsia (no color) | #5F5F5F | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63C2C
#A63C2C
oklch(50.3% 0.143 31.1)
- #007180
#007180
oklch(50.3% 0.087 210.7)
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 #A63C2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.019
- Rusty Red #AF2F0D ΔE 0.028
- Russet #A13905 ΔE 0.029
- Brown #A52A2A ΔE 0.031
- Rust Red #AA2704 ΔE 0.035
- Burnt Umber #A0450E ΔE 0.036
- Firebrick #B22222 ΔE 0.039
- Rufous #AE2012 ΔE 0.040
Use #A63C2C 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.