#A33728
Closest named color: Brick (#A03623). oklch(49.1% 0.146 30.8), rgb(163, 55, 40).
Aa
White text reads best on this color (6.69:1).
About this color
#A33728 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.146 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.008 away. White text reads best on it, at 6.69:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #A33728 |
| RGB | rgb(163, 55, 40) |
| HSL | hsl(7, 61%, 40%) |
| OKLCH | oklch(49.1% 0.146 30.8) |
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 #A33728 | 6.69:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #A33728 | 3.13:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #A33728 text on white | 6.69:1 | AA | Lc 82.1 | Fine for body text |
| #A33728 text on black | 3.13:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E2
oklch(93.5% 0.02 28.9)
-
Step 200
200
#F2D0CA
oklch(88.5% 0.039 29.7)
-
Step 300
300
#EBB0A5
oklch(80.9% 0.071 30.7)
-
Step 400
400
#DE8575
oklch(70.7% 0.113 31)
-
Step 500
500
#D26351
oklch(63.1% 0.144 30.9)
-
Step 600
600
#BD4735
oklch(55.6% 0.156 31.2)
-
Step 700
700 (this color)
#A33728
oklch(49.1% 0.146 30.8)
-
Step 800
800
#842F22
oklch(42.7% 0.12 31.2)
-
Step 900
900
#6B2B21
oklch(37.8% 0.094 30.9)
-
Step 950
950
#3F1A14
oklch(27.1% 0.059 30.8)
#A33728 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) | #554D26 | 0.153 |
| Deuteranopia (no green cones) | #706524 | 0.140 |
| Tritanopia (no blue cones) | #B31934 | 0.051 |
| Achromatopsia (no color) | #5C5C5C | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A33728
#A33728
oklch(49.1% 0.146 30.8)
- #006D7C
#006D7C
oklch(49% 0.085 211.2)
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 #A33728, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.008
- Brown #A52A2A ΔE 0.022
- Russet #A13905 ΔE 0.026
- Rusty Red #AF2F0D ΔE 0.028
- Rust Red #AA2704 ΔE 0.028
- Rufous #AE2012 ΔE 0.034
- Firebrick #B22222 ΔE 0.036
- Burnt Red #9F2305 ΔE 0.037
Use #A33728 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.