Lydia's Louboutins (and their distinctive red soles) from Breaking Bad also appear in Better Call Saul and El Camino (in Todd's snow globe). Significance of blood red color explained in comments :
Christian Louboutin x The Royal Ballet Is The Ultimate Christmas Party Shoe Collection | British Vogue
As a girl, I worried a lot during this scene... : r/breakingbad
Getting Your Christian Louboutin Shoes To Fit - Raindrops of Sapphire
Christian Louboutin: a six-inch heel is a form of freedom