#A63D1A
Closest named color: Russet (#A13905). oklch(50.2% 0.146 37.7), rgb(166, 61, 26).
Aa
White text reads best on this color (6.35:1).
About this color
#A63D1A is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.146 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Russet (#A13905), ΔE 0.017 away. White text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Russet (#A13905) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #A63D1A |
| RGB | rgb(166, 61, 26) |
| HSL | hsl(15, 73%, 38%) |
| OKLCH | oklch(50.2% 0.146 37.7) |
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 #A63D1A | 6.35:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #A63D1A | 3.30:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #A63D1A text on white | 6.35:1 | AA | Lc 80.7 | Fine for body text |
| #A63D1A 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F2D1C7
oklch(88.6% 0.04 37.5)
-
Step 300
300
#EAB1A0
oklch(80.8% 0.071 37.3)
-
Step 400
400
#DD876C
oklch(70.8% 0.113 38.2)
-
Step 500
500
#D16544
oklch(63% 0.145 37.7)
-
Step 600
600
#BD4924
oklch(55.7% 0.158 37.5)
-
Step 700
700 (this color)
#A63D1A
oklch(50.2% 0.146 37.7)
-
Step 800
800
#843115
oklch(42.8% 0.121 38.1)
-
Step 900
900
#6A2C19
oklch(37.7% 0.094 37.6)
-
Step 950
950
#3E1A0F
oklch(26.8% 0.06 37.7)
#A63D1A 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) | #5B5114 | 0.147 |
| Deuteranopia (no green cones) | #756815 | 0.133 |
| Tritanopia (no blue cones) | #B72136 | 0.062 |
| Achromatopsia (no color) | #5F5F5F | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63D1A
#A63D1A
oklch(50.2% 0.146 37.7)
- #007086
#007086
oklch(50.3% 0.09 217.7)
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 #A63D1A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Russet #A13905 ΔE 0.017
- Burnt Umber #A0450E ΔE 0.022
- Brick #A03623 ΔE 0.023
- Rusty Red #AF2F0D ΔE 0.025
- Rust Red #AA2704 ΔE 0.033
- Brown #A52A2A ΔE 0.041
- Rufous #AE2012 ΔE 0.042
- Sienna #A0522D ΔE 0.042
Use #A63D1A 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.