#A33B39
Closest named color: Brick (#A03623). oklch(49.9% 0.138 24.6), rgb(163, 59, 57).
Aa
White text reads best on this color (6.47:1).
About this color
#A33B39 is a medium-dark, moderately saturated red. In OKLCH its lightness is 50%, its chroma 0.138 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.025 away. White text reads best on it, at 6.47:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.138) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.24:1 |
| White text | 6.47:1 |
Values
| HEX | #A33B39 |
| RGB | rgb(163, 59, 57) |
| HSL | hsl(1, 48%, 43%) |
| OKLCH | oklch(49.9% 0.138 24.6) |
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 #A33B39 | 6.47:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #A33B39 | 3.24:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #A33B39 text on white | 6.47:1 | AA | Lc 81.3 | Fine for body text |
| #A33B39 text on black | 3.24:1 | AA large text | Lc -20.5 | 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
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F1D0CD
oklch(88.5% 0.037 24)
-
Step 300
300
#E9B0AB
oklch(80.8% 0.067 24.4)
-
Step 400
400
#DB857F
oklch(70.6% 0.107 24.4)
-
Step 500
500
#CF645F
oklch(63.1% 0.137 24.5)
-
Step 600
600
#BB4845
oklch(55.6% 0.15 24.7)
-
Step 700
700 (this color)
#A33B39
oklch(49.9% 0.138 24.6)
-
Step 800
800
#82302E
oklch(42.7% 0.114 24.6)
-
Step 900
900
#692B29
oklch(37.6% 0.09 24.2)
-
Step 950
950
#3E1A18
oklch(27% 0.057 24.8)
#A33B39 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) | #565038 | 0.148 |
| Deuteranopia (no green cones) | #706636 | 0.136 |
| Tritanopia (no blue cones) | #B3243B | 0.043 |
| Achromatopsia (no color) | #5E5E5E | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A33B39
#A33B39
oklch(49.9% 0.138 24.6)
- #00707A
#00707A
oklch(49.8% 0.085 205.6)
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 #A33B39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.025
- Brown #A52A2A ΔE 0.028
- Rusty Red #AF2F0D ΔE 0.041
- Light Maroon #A24857 ΔE 0.041
- Firebrick #B22222 ΔE 0.042
- Russet #A13905 ΔE 0.043
- Rust Red #AA2704 ΔE 0.044
- Rufous #AE2012 ΔE 0.045
Use #A33B39 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.