#AA2731
Closest named color: Brown (#A52A2A). oklch(48.8% 0.167 22.3), rgb(170, 39, 49).
Aa
White text reads best on this color (6.89:1).
About this color
#AA2731 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.167 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.014 away. White text reads best on it, at 6.89:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.167) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.04:1 |
| White text | 6.89:1 |
Values
| HEX | #AA2731 |
| RGB | rgb(170, 39, 49) |
| HSL | hsl(355, 63%, 41%) |
| OKLCH | oklch(48.8% 0.167 22.3) |
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 #AA2731 | 6.89:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #AA2731 | 3.04:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #AA2731 text on white | 6.89:1 | AA | Lc 82.5 | Fine for body text |
| #AA2731 text on black | 3.04:1 | AA large text | Lc -19.4 | 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
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F0ACA9
oklch(80.8% 0.081 21.8)
-
Step 400
400
#E67E7B
oklch(70.7% 0.129 22.6)
-
Step 500
500
#DB585A
oklch(63.1% 0.165 22.2)
-
Step 600
600
#C63840
oklch(55.6% 0.178 22.3)
-
Step 700
700 (this color)
#AA2731
oklch(48.8% 0.167 22.3)
-
Step 800
800
#8B242A
oklch(42.7% 0.138 22.2)
-
Step 900
900
#702426
oklch(37.8% 0.108 22.4)
-
Step 950
950
#421617
oklch(27% 0.069 21.5)
#AA2731 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) | #4E4830 | 0.182 |
| Deuteranopia (no green cones) | #6F642D | 0.166 |
| Tritanopia (no blue cones) | #BB002C | 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°).
- #AA2731
#AA2731
oklch(48.8% 0.167 22.3)
- #006D74
#006D74
oklch(48.7% 0.083 202.6)
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 #AA2731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.014
- Firebrick #B22222 ΔE 0.021
- Rufous #AE2012 ΔE 0.027
- Rouge #AB1239 ΔE 0.027
- Rust Red #AA2704 ΔE 0.035
- Brick #A03623 ΔE 0.036
- Auburn #9B2226 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.038
Use #AA2731 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.