If you love purple, then get the Gap Seamless Ribbed Bralette ($31, originally $35).
Hanes Wireless Bras in Womens Bras
Gap Sale On Fall Wardrobe Essentials - Brit + Co
Stretch ribbed knit. Tank straps. Scoopneck. Elasticized band at bottom. #871436
Seamless Ribbed Bralette
Seamless Rib Bralette
Gap Seamless Ribbed Bralette in Purple
Seamless Rib Bralette
Plunge Seamless Bralette
Unlined Bras Rank & Style
Seamless Rib Bralette