Colors vary production lot to lot color. Even with standard or branded colors, Like Bianchi's Celeste Green, the retouch paint size is so small that it would dry on the shelf up before sale, so they don't bother to make retouch available. So, I use Testor Mdole Paint too. The good news and bad news is there is a rainbow of colors to choose from so you may not get it right. My bike is bright yellow, and I find the Testor samples to be either too yellow, or too orange for an exact match. But is just a touch up, so it really does not matter. on nicked carbon clear polish works best. Just use a fine tipped brush and paint in tiny "dots" of paint until the area is filled. The light will fill in any inperfections producing the illusion of a natural finish. No, it won't look like new, but will be good enough.