#A3273A
Closest named color: Brown (#A52A2A). oklch(47.7% 0.159 17.5), rgb(163, 39, 58).
Aa
White text reads best on this color (7.21:1).
About this color
#A3273A is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.159 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.023 away. White text reads best on it, at 7.21:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.159) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.90:1 |
| White text | 7.21:1 |
Values
| HEX | #A3273A |
| RGB | rgb(163, 39, 58) |
| HSL | hsl(351, 61%, 40%) |
| OKLCH | oklch(47.7% 0.159 17.5) |
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 #A3273A | 7.21:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #A3273A | 2.90:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #A3273A text on white | 7.21:1 | AAA | Lc 83.8 | Fine for body text |
| #A3273A text on black | 2.90:1 | Fails | Lc -18.2 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F4CECF
oklch(88.4% 0.043 16.2)
-
Step 300
300
#EEADAE
oklch(80.9% 0.077 17.9)
-
Step 400
400
#E37F84
oklch(70.7% 0.123 17.5)
-
Step 500
500
#D85A65
oklch(63.1% 0.158 17.6)
-
Step 600
600
#C33B4D
oklch(55.6% 0.172 17.3)
-
Step 700
700 (this color)
#A3273A
oklch(47.7% 0.159 17.5)
-
Step 800
800
#882733
oklch(42.7% 0.131 17.7)
-
Step 900
900
#6E252D
oklch(37.7% 0.104 17.1)
-
Step 950
950
#41171A
oklch(27.1% 0.065 18.2)
#A3273A 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) | #4A463A | 0.176 |
| Deuteranopia (no green cones) | #696036 | 0.161 |
| Tritanopia (no blue cones) | #B3002F | 0.037 |
| Achromatopsia (no color) | #575757 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3273A
#A3273A
oklch(47.7% 0.159 17.5)
- #006A6D
#006A6D
oklch(47.6% 0.081 198.2)
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 #A3273A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.023
- Rouge #AB1239 ΔE 0.023
- Auburn #9B2226 ΔE 0.030
- Firebrick #B22222 ΔE 0.040
- Cranberry #9E003A ΔE 0.040
- Brick #A03623 ΔE 0.043
- Rufous #AE2012 ΔE 0.043
- Raspberry #B00149 ΔE 0.045
Use #A3273A 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.