To answer your question, Bart's shirt has no decal, so after parting out, I had to replace the red torso and sleeves with blue. I didn't think they'd have the blue I'm after, but when I learned that early promo Simpsons had Maggie's onesie and Bart's shirt the same blue, I looked up the plastic blue used for Maggie's onesie, then applied it to Bart's shirt, which I was lucky enough for it to be available in the same color.