#A3363D
Closest named color: Brown (#A52A2A). oklch(49.3% 0.144 20.5), rgb(163, 54, 61).
Aa
White text reads best on this color (6.66:1).
About this color
#A3363D is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.144 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.024 away. White text reads best on it, at 6.66:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #A3363D |
| RGB | rgb(163, 54, 61) |
| HSL | hsl(356, 50%, 43%) |
| OKLCH | oklch(49.3% 0.144 20.5) |
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 #A3363D | 6.66:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #A3363D | 3.15:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #A3363D text on white | 6.66:1 | AA | Lc 82.0 | Fine for body text |
| #A3363D text on black | 3.15:1 | AA large text | Lc -19.9 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CE
oklch(88.6% 0.038 21.9)
-
Step 300
300
#EAAFAE
oklch(80.8% 0.069 19.8)
-
Step 400
400
#DD8383
oklch(70.6% 0.111 20.2)
-
Step 500
500
#D16164
oklch(63% 0.142 20.4)
-
Step 600
600
#BD454B
oklch(55.7% 0.154 20.8)
-
Step 700
700 (this color)
#A3363D
oklch(49.3% 0.144 20.5)
-
Step 800
800
#842D32
oklch(42.7% 0.119 20.4)
-
Step 900
900
#6A2A2C
oklch(37.7% 0.092 20.7)
-
Step 950
950
#3F191A
oklch(27.1% 0.06 20.3)
#A3363D 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) | #524E3C | 0.157 |
| Deuteranopia (no green cones) | #6E653A | 0.144 |
| Tritanopia (no blue cones) | #B31D39 | 0.040 |
| Achromatopsia (no color) | #5C5C5C | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3363D
#A3363D
oklch(49.3% 0.144 20.5)
- #006F74
#006F74
oklch(49.2% 0.084 200.3)
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 #A3363D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.024
- Brick #A03623 ΔE 0.031
- Firebrick #B22222 ΔE 0.040
- Light Maroon #A24857 ΔE 0.042
- Auburn #9B2226 ΔE 0.042
- Light Burgundy #A8415B ΔE 0.043
- Rouge #AB1239 ΔE 0.043
- Rufous #AE2012 ΔE 0.045
Use #A3363D 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.