#A6331B
Closest named color: Brick (#A03623). oklch(49% 0.155 33.5), rgb(166, 51, 27).
Aa
White text reads best on this color (6.75:1).
About this color
#A6331B is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.155 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.013 away. White text reads best on it, at 6.75:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.11:1 |
| White text | 6.75:1 |
Values
| HEX | #A6331B |
| RGB | rgb(166, 51, 27) |
| HSL | hsl(10, 72%, 38%) |
| OKLCH | oklch(49% 0.155 33.5) |
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 #A6331B | 6.75:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #A6331B | 3.11:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #A6331B text on white | 6.75:1 | AA | Lc 82.2 | Fine for body text |
| #A6331B text on black | 3.11:1 | AA large text | Lc -19.7 | 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
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F3D0C8
oklch(88.5% 0.041 33)
-
Step 300
300
#EDB0A1
oklch(81% 0.075 34.2)
-
Step 400
400
#E1836E
oklch(70.6% 0.121 33.5)
-
Step 500
500
#D66048
oklch(63.1% 0.154 33.1)
-
Step 600
600
#C14329
oklch(55.6% 0.166 33.4)
-
Step 700
700 (this color)
#A6331B
oklch(49% 0.155 33.5)
-
Step 800
800
#872C19
oklch(42.7% 0.128 33.5)
-
Step 900
900
#6D291B
oklch(37.7% 0.1 33.4)
-
Step 950
950
#401911
oklch(27% 0.063 33.1)
#A6331B 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) | #554B17 | 0.161 |
| Deuteranopia (no green cones) | #716515 | 0.147 |
| Tritanopia (no blue cones) | #B7082F | 0.058 |
| Achromatopsia (no color) | #5B5B5B | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A6331B
#A6331B
oklch(49% 0.155 33.5)
- #006D7E
#006D7E
oklch(49.1% 0.086 213.3)
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 #A6331B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.013
- Rust Red #AA2704 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.018
- Russet #A13905 ΔE 0.021
- Brown #A52A2A ΔE 0.024
- Rufous #AE2012 ΔE 0.026
- Burnt Red #9F2305 ΔE 0.031
- Firebrick #B22222 ΔE 0.032
Use #A6331B 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.