#A3231D
Closest named color: Brown (#A52A2A). oklch(46.9% 0.165 28.2), rgb(163, 35, 29).
Aa
White text reads best on this color (7.45:1).
About this color
#A3231D is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.165 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.015 away. White text reads best on it, at 7.45:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #A3231D |
| RGB | rgb(163, 35, 29) |
| HSL | hsl(3, 70%, 38%) |
| OKLCH | oklch(46.9% 0.165 28.2) |
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 #A3231D | 7.45:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #A3231D | 2.81:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #A3231D text on white | 7.45:1 | AAA | Lc 84.4 | Fine for body text |
| #A3231D text on black | 2.81:1 | Fails | Lc -17.5 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E4E1
oklch(93.5% 0.023 27.3)
-
Step 200
200
#F5CFC9
oklch(88.5% 0.044 28.5)
-
Step 300
300
#F0ADA4
oklch(80.8% 0.08 27.6)
-
Step 400
400
#E57F73
oklch(70.6% 0.128 27.8)
-
Step 500
500
#DB5B4E
oklch(63.2% 0.163 28.4)
-
Step 600
600
#C63B31
oklch(55.6% 0.177 28.3)
-
Step 700
700 (this color)
#A3231D
oklch(46.9% 0.165 28.2)
-
Step 800
800
#8A261F
oklch(42.6% 0.136 28.3)
-
Step 900
900
#6F251F
oklch(37.6% 0.106 27.9)
-
Step 950
950
#421713
oklch(27.1% 0.068 27.8)
#A3231D 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) | #4B431B | 0.178 |
| Deuteranopia (no green cones) | #6B5F17 | 0.161 |
| Tritanopia (no blue cones) | #B40023 | 0.039 |
| Achromatopsia (no color) | #555555 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3231D
#A3231D
oklch(46.9% 0.165 28.2)
- #006772
#006772
oklch(47% 0.081 207.6)
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 #A3231D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.015
- Burnt Red #9F2305 ΔE 0.018
- Auburn #9B2226 ΔE 0.020
- Rufous #AE2012 ΔE 0.023
- Rust Red #AA2704 ΔE 0.023
- Brick #A03623 ΔE 0.028
- Firebrick #B22222 ΔE 0.032
- Carmine #9D0216 ΔE 0.033
Use #A3231D 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.