#A42531
Closest named color: Brown (#A52A2A). oklch(47.5% 0.162 21.3), rgb(164, 37, 49).
Aa
White text reads best on this color (7.27:1).
About this color
#A42531 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.162 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.013 away. White text reads best on it, at 7.27:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.88:1 |
| White text | 7.27:1 |
Values
| HEX | #A42531 |
| RGB | rgb(164, 37, 49) |
| HSL | hsl(354, 63%, 39%) |
| OKLCH | oklch(47.5% 0.162 21.3) |
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 #A42531 | 7.27:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #A42531 | 2.88:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #A42531 text on white | 7.27:1 | AAA | Lc 83.9 | Fine for body text |
| #A42531 text on black | 2.88:1 | Fails | Lc -18.1 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CECD
oklch(88.4% 0.044 19.8)
-
Step 300
300
#EFADAA
oklch(80.9% 0.078 21.9)
-
Step 400
400
#E47F7E
oklch(70.7% 0.125 21.3)
-
Step 500
500
#D95A5D
oklch(63.1% 0.16 21.5)
-
Step 600
600
#C53A44
oklch(55.6% 0.175 21.1)
-
Step 700
700 (this color)
#A42531
oklch(47.5% 0.162 21.3)
-
Step 800
800
#8A262D
oklch(42.8% 0.135 21.2)
-
Step 900
900
#6F2528
oklch(37.8% 0.105 21.3)
-
Step 950
950
#411718
oklch(27% 0.066 21.1)
#A42531 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) | #4B4530 | 0.177 |
| Deuteranopia (no green cones) | #6A602D | 0.163 |
| Tritanopia (no blue cones) | #B4002B | 0.035 |
| Achromatopsia (no color) | #575757 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A42531
#A42531
oklch(47.5% 0.162 21.3)
- #00696F
#00696F
oklch(47.4% 0.081 201.7)
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 #A42531, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.013
- Auburn #9B2226 ΔE 0.023
- Rouge #AB1239 ΔE 0.026
- Firebrick #B22222 ΔE 0.032
- Rufous #AE2012 ΔE 0.033
- Brick #A03623 ΔE 0.036
- Burnt Red #9F2305 ΔE 0.038
- Rust Red #AA2704 ΔE 0.039
Use #A42531 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.