#A33311
Closest named color: Brick (#A03623). oklch(48.4% 0.154 36.1), rgb(163, 51, 17).
Aa
White text reads best on this color (6.91:1).
About this color
#A33311 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.154 and its hue 36°. 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 6.91:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.154) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #A33311 |
| RGB | rgb(163, 51, 17) |
| HSL | hsl(14, 81%, 35%) |
| OKLCH | oklch(48.4% 0.154 36.1) |
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 #A33311 | 6.91:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #A33311 | 3.03:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #A33311 text on white | 6.91:1 | AA | Lc 82.8 | Fine for body text |
| #A33311 text on black | 3.03:1 | AA large text | Lc -19.1 | 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
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D0C7
oklch(88.5% 0.041 34.8)
-
Step 300
300
#ECB0A0
oklch(80.9% 0.074 35.5)
-
Step 400
400
#E0846B
oklch(70.6% 0.12 36)
-
Step 500
500
#D56243
oklch(63.2% 0.152 36.1)
-
Step 600
600
#C04522
oklch(55.6% 0.165 36.1)
-
Step 700
700 (this color)
#A33311
oklch(48.4% 0.154 36.1)
-
Step 800
800
#862D14
oklch(42.6% 0.127 36)
-
Step 900
900
#6C2A18
oklch(37.7% 0.099 36.1)
-
Step 950
950
#40190F
oklch(27% 0.064 35.5)
#A33311 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) | #544A09 | 0.158 |
| Deuteranopia (no green cones) | #706308 | 0.142 |
| Tritanopia (no blue cones) | #B40A2D | 0.061 |
| Achromatopsia (no color) | #5A5A5A | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A33311
#A33311
oklch(48.4% 0.154 36.1)
- #006A7E
#006A7E
oklch(48.3% 0.086 216.8)
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 #A33311, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.013
- Russet #A13905 ΔE 0.014
- Rust Red #AA2704 ΔE 0.019
- Rusty Red #AF2F0D ΔE 0.024
- Burnt Red #9F2305 ΔE 0.027
- Brown #A52A2A ΔE 0.030
- Rufous #AE2012 ΔE 0.031
- Burnt Umber #A0450E ΔE 0.036
Use #A33311 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.