#A63840
Closest named color: Brown (#A52A2A). oklch(50.1% 0.144 19.9), rgb(166, 56, 64).
Aa
White text reads best on this color (6.43:1).
About this color
#A63840 is a medium-dark, vivid red. In OKLCH its lightness is 50%, 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 0.030 away. White text reads best on it, at 6.43:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #A63840 |
| RGB | rgb(166, 56, 64) |
| HSL | hsl(356, 50%, 44%) |
| OKLCH | oklch(50.1% 0.144 19.9) |
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 #A63840 | 6.43:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #A63840 | 3.26:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #A63840 text on white | 6.43:1 | AA | Lc 81.1 | Fine for body text |
| #A63840 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2D0CF
oklch(88.6% 0.038 19.9)
-
Step 300
300
#EBAFAE
oklch(80.9% 0.071 19.8)
-
Step 400
400
#DE8384
oklch(70.7% 0.112 19.6)
-
Step 500
500
#D26165
oklch(63.2% 0.143 19.9)
-
Step 600
600
#BD444C
oklch(55.6% 0.156 19.9)
-
Step 700
700 (this color)
#A63840
oklch(50.1% 0.144 19.9)
-
Step 800
800
#842D33
oklch(42.7% 0.119 19.8)
-
Step 900
900
#6A292C
oklch(37.6% 0.093 20)
-
Step 950
950
#3F191A
oklch(27.1% 0.06 20.3)
#A63840 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) | #545040 | 0.157 |
| Deuteranopia (no green cones) | #70673D | 0.145 |
| Tritanopia (no blue cones) | #B6203C | 0.039 |
| Achromatopsia (no color) | #5E5E5E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63840
#A63840
oklch(50.1% 0.144 19.9)
- #007277
#007277
oklch(50.2% 0.085 200.1)
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 #A63840, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.030
- Brick #A03623 ΔE 0.036
- Light Maroon #A24857 ΔE 0.037
- Light Burgundy #A8415B ΔE 0.038
- Firebrick #B22222 ΔE 0.041
- Rouge #AB1239 ΔE 0.046
- Rusty Red #AF2F0D ΔE 0.047
- Dull Red #BB3F3F ΔE 0.047
Use #A63840 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.