#A33521
Closest named color: Brick (#A03623). oklch(48.8% 0.149 32.5), rgb(163, 53, 33).
Aa
White text reads best on this color (6.79:1).
About this color
#A33521 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.149 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.006 away. White text reads best on it, at 6.79:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.149) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #A33521 |
| RGB | rgb(163, 53, 33) |
| HSL | hsl(9, 66%, 38%) |
| OKLCH | oklch(48.8% 0.149 32.5) |
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 #A33521 | 6.79:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #A33521 | 3.08:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #A33521 text on white | 6.79:1 | AA | Lc 82.5 | Fine for body text |
| #A33521 text on black | 3.08:1 | AA large text | Lc -19.4 | 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
#F7E5E1
oklch(93.5% 0.021 32.5)
-
Step 200
200
#F2D0C9
oklch(88.4% 0.04 31.6)
-
Step 300
300
#EBB0A3
oklch(80.8% 0.072 32.7)
-
Step 400
400
#DF8572
oklch(70.8% 0.115 32.8)
-
Step 500
500
#D3624D
oklch(63% 0.147 32.2)
-
Step 600
600
#BF462F
oklch(55.7% 0.16 32.8)
-
Step 700
700 (this color)
#A33521
oklch(48.8% 0.149 32.5)
-
Step 800
800
#852E1E
oklch(42.7% 0.123 32.6)
-
Step 900
900
#6B2A1E
oklch(37.6% 0.096 32.3)
-
Step 950
950
#3F1A12
oklch(27.1% 0.06 33.5)
#A33521 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) | #554C1E | 0.154 |
| Deuteranopia (no green cones) | #70641C | 0.142 |
| Tritanopia (no blue cones) | #B41331 | 0.055 |
| Achromatopsia (no color) | #5B5B5B | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A33521
#A33521
oklch(48.8% 0.149 32.5)
- #006C7C
#006C7C
oklch(48.8% 0.085 212.4)
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 #A33521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.006
- Russet #A13905 ΔE 0.021
- Brown #A52A2A ΔE 0.023
- Rust Red #AA2704 ΔE 0.023
- Rusty Red #AF2F0D ΔE 0.025
- Rufous #AE2012 ΔE 0.031
- Burnt Red #9F2305 ΔE 0.032
- Firebrick #B22222 ΔE 0.036
Use #A33521 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.