#A63C30
Closest named color: Brick (#A03623). oklch(50.3% 0.142 29.4), rgb(166, 60, 48).
Aa
White text reads best on this color (6.34:1).
About this color
#A63C30 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.142 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.021 away. White text reads best on it, at 6.34:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #A63C30 |
| RGB | rgb(166, 60, 48) |
| HSL | hsl(6, 55%, 42%) |
| OKLCH | oklch(50.3% 0.142 29.4) |
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 #A63C30 | 6.34:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #A63C30 | 3.31:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #A63C30 text on white | 6.34:1 | AA | Lc 80.7 | Fine for body text |
| #A63C30 text on black | 3.31:1 | 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
#F2D0CB
oklch(88.5% 0.039 27.8)
-
Step 300
300
#EAB1A7
oklch(81% 0.069 29.9)
-
Step 400
400
#DD8578
oklch(70.7% 0.111 29.1)
-
Step 500
500
#D16455
oklch(63.2% 0.141 29.6)
-
Step 600
600
#BC483A
oklch(55.6% 0.153 29.6)
-
Step 700
700 (this color)
#A63C30
oklch(50.3% 0.142 29.4)
-
Step 800
800
#832F26
oklch(42.6% 0.118 29)
-
Step 900
900
#6A2B23
oklch(37.7% 0.092 29.4)
-
Step 950
950
#3E1A15
oklch(26.9% 0.058 29.5)
#A63C30 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) | #59512E | 0.149 |
| Deuteranopia (no green cones) | #73682D | 0.137 |
| Tritanopia (no blue cones) | #B6233A | 0.049 |
| Achromatopsia (no color) | #5F5F5F | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63C30
#A63C30
oklch(50.3% 0.142 29.4)
- #00717F
#00717F
oklch(50.3% 0.087 209.7)
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 #A63C30, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.021
- Brown #A52A2A ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.031
- Russet #A13905 ΔE 0.033
- Rust Red #AA2704 ΔE 0.037
- Firebrick #B22222 ΔE 0.039
- Burnt Umber #A0450E ΔE 0.040
- Rufous #AE2012 ΔE 0.040
Use #A63C30 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.