#A63404
Closest named color: Russet (#A13905). oklch(49% 0.157 38.2), rgb(166, 52, 4).
Aa
White text reads best on this color (6.74:1).
About this color
#A63404 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.157 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Russet (#A13905), ΔE 0.012 away. White text reads best on it, at 6.74:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Russet (#A13905) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #A63404 |
| RGB | rgb(166, 52, 4) |
| HSL | hsl(18, 95%, 33%) |
| OKLCH | oklch(49% 0.157 38.2) |
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 #A63404 | 6.74:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #A63404 | 3.11:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #A63404 text on white | 6.74:1 | AA | Lc 82.1 | Fine for body text |
| #A63404 text on black | 3.11:1 | AA large text | Lc -19.8 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F3D0C5
oklch(88.4% 0.042 38.2)
-
Step 300
300
#EDB09D
oklch(80.9% 0.077 38)
-
Step 400
400
#E18467
oklch(70.7% 0.122 38.1)
-
Step 500
500
#D6613C
oklch(63.1% 0.157 38)
-
Step 600
600
#C14416
oklch(55.6% 0.169 38.2)
-
Step 700
700 (this color)
#A63404
oklch(49% 0.157 38.2)
-
Step 800
800
#872D0B
oklch(42.7% 0.13 38.4)
-
Step 900
900
#6D2A13
oklch(37.8% 0.102 38.6)
-
Step 950
950
#40190D
oklch(27% 0.065 37.7)
#A63404 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) | #564B00 | 0.159 |
| Deuteranopia (no green cones) | #726500 | 0.144 |
| Tritanopia (no blue cones) | #B7072D | 0.066 |
| Achromatopsia (no color) | #5B5B5B | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A63404
#A63404
oklch(49% 0.157 38.2)
- #006C82
#006C82
oklch(49.1% 0.088 218.4)
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 #A63404, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Russet #A13905 ΔE 0.012
- Rusty Red #AF2F0D ΔE 0.019
- Rust Red #AA2704 ΔE 0.020
- Brick #A03623 ΔE 0.021
- Burnt Umber #A0450E ΔE 0.032
- Rufous #AE2012 ΔE 0.032
- Burnt Red #9F2305 ΔE 0.033
- Brown #A52A2A ΔE 0.036
Use #A63404 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.