#A63A2F
Closest named color: Brick (#A03623). oklch(50.1% 0.145 29), rgb(166, 58, 47).
Aa
White text reads best on this color (6.42:1).
About this color
#A63A2F is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.145 and its hue 29°. 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 6.42:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.145) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #A63A2F |
| RGB | rgb(166, 58, 47) |
| HSL | hsl(6, 56%, 42%) |
| OKLCH | oklch(50.1% 0.145 29) |
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 #A63A2F | 6.42:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #A63A2F | 3.26:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #A63A2F text on white | 6.42:1 | AA | Lc 81.0 | Fine for body text |
| #A63A2F text on black | 3.26:1 | AA large text | Lc -20.8 | 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 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
#F2D0CB
oklch(88.5% 0.039 27.8)
-
Step 300
300
#EAB0A7
oklch(80.8% 0.07 28.7)
-
Step 400
400
#DE8578
oklch(70.8% 0.112 29.1)
-
Step 500
500
#D26355
oklch(63.1% 0.143 29)
-
Step 600
600
#BD463A
oklch(55.5% 0.156 28.8)
-
Step 700
700 (this color)
#A63A2F
oklch(50.1% 0.145 29)
-
Step 800
800
#842F26
oklch(42.7% 0.119 29)
-
Step 900
900
#6A2B23
oklch(37.7% 0.092 29.4)
-
Step 950
950
#3F1A15
oklch(27.1% 0.059 29.4)
#A63A2F 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) | #58502D | 0.151 |
| Deuteranopia (no green cones) | #73672C | 0.138 |
| Tritanopia (no blue cones) | #B61F38 | 0.049 |
| Achromatopsia (no color) | #5F5F5F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63A2F
#A63A2F
oklch(50.1% 0.145 29)
- #00717E
#00717E
oklch(50.2% 0.086 208.7)
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 #A63A2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.019
- Brown #A52A2A ΔE 0.027
- Rusty Red #AF2F0D ΔE 0.029
- Russet #A13905 ΔE 0.033
- Rust Red #AA2704 ΔE 0.035
- Firebrick #B22222 ΔE 0.036
- Rufous #AE2012 ΔE 0.037
- Burnt Umber #A0450E ΔE 0.041
Use #A63A2F 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.