#AA2131
Closest named color: Brown (#A52A2A). oklch(48.3% 0.171 21), rgb(170, 33, 49).
Aa
White text reads best on this color (7.06:1).
About this color
#AA2131 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.171 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.018 away. White text reads best on it, at 7.06:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.97:1 |
| White text | 7.06:1 |
Values
| HEX | #AA2131 |
| RGB | rgb(170, 33, 49) |
| HSL | hsl(353, 67%, 40%) |
| OKLCH | oklch(48.3% 0.171 21) |
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 #AA2131 | 7.06:1 | AAA | Lc -88.0 | Fine for body text |
| Black text on #AA2131 | 2.97:1 | Fails | Lc 21.1 | Dividers and decoration only |
| #AA2131 text on white | 7.06:1 | AAA | Lc 83.0 | Fine for body text |
| #AA2131 text on black | 2.97:1 | Fails | Lc -19.0 | 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
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F2ACAA
oklch(81% 0.083 20.9)
-
Step 400
400
#E77C7C
oklch(70.6% 0.132 21)
-
Step 500
500
#DD565B
oklch(63.1% 0.169 21.2)
-
Step 600
600
#C83441
oklch(55.5% 0.184 21.1)
-
Step 700
700 (this color)
#AA2131
oklch(48.3% 0.171 21)
-
Step 800
800
#8C212B
oklch(42.6% 0.142 20.8)
-
Step 900
900
#712227
oklch(37.7% 0.111 20.7)
-
Step 950
950
#421517
oklch(26.8% 0.07 20.5)
#AA2131 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) | #4B4630 | 0.189 |
| Deuteranopia (no green cones) | #6D632C | 0.173 |
| Tritanopia (no blue cones) | #BB0029 | 0.035 |
| Achromatopsia (no color) | #585858 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA2131
#AA2131
oklch(48.3% 0.171 21)
- #006C71
#006C71
oklch(48.3% 0.082 200.4)
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 #AA2131, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.018
- Rouge #AB1239 ΔE 0.020
- Firebrick #B22222 ΔE 0.024
- Rufous #AE2012 ΔE 0.029
- Auburn #9B2226 ΔE 0.034
- Rust Red #AA2704 ΔE 0.039
- Brick #A03623 ΔE 0.041
- Scarlet #BE0119 ΔE 0.043
Use #AA2131 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.