#AA273B
Closest named color: Rouge (#AB1239). oklch(49% 0.166 17.9), rgb(170, 39, 59).
Aa
White text reads best on this color (6.85:1).
About this color
#AA273B is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.166 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.021 away. White text reads best on it, at 6.85:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #AA273B |
| RGB | rgb(170, 39, 59) |
| HSL | hsl(351, 63%, 41%) |
| OKLCH | oklch(49% 0.166 17.9) |
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 #AA273B | 6.85:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #AA273B | 3.06:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #AA273B text on white | 6.85:1 | AA | Lc 82.3 | Fine for body text |
| #AA273B text on black | 3.06:1 | AA large text | Lc -19.6 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#F0ACAD
oklch(80.9% 0.08 18)
-
Step 400
400
#E57D82
oklch(70.6% 0.128 17.8)
-
Step 500
500
#DB5763
oklch(63.1% 0.165 17.8)
-
Step 600
600
#C6374A
oklch(55.6% 0.179 18)
-
Step 700
700 (this color)
#AA273B
oklch(49% 0.166 17.9)
-
Step 800
800
#8A2331
oklch(42.6% 0.137 17.9)
-
Step 900
900
#6F232B
oklch(37.6% 0.107 17.9)
-
Step 950
950
#42161A
oklch(27.1% 0.068 17.4)
#AA273B 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) | #4D493B | 0.183 |
| Deuteranopia (no green cones) | #6E6437 | 0.167 |
| Tritanopia (no blue cones) | #BB0030 | 0.037 |
| Achromatopsia (no color) | #5A5A5A | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA273B
#AA273B
oklch(49% 0.166 17.9)
- #006E71
#006E71
oklch(48.9% 0.083 198.1)
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 #AA273B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.021
- Brown #A52A2A ΔE 0.024
- Firebrick #B22222 ΔE 0.031
- Rufous #AE2012 ΔE 0.039
- Raspberry #B00149 ΔE 0.041
- Auburn #9B2226 ΔE 0.041
- Rose Red #BE013C ΔE 0.043
- Lipstick Red #C0022F ΔE 0.045
Use #AA273B 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.