American Standard Rise and Shine 5324.019 Light Turquoise Elongated Toilet Seat - Noel's Plumbing Supply
Vtg Twilight Blue Porcelain Toilet Bowl Tank Lid Old Eljer Retro Bath 212-22E | eBay
Circa 1890 Thomas Twyford Blue Transferware Antique Toilet Bowl – DEA Bathroom Machineries
PREGNANT women are turning their toilet seats BLUE - and this may be the cause - The Healthy Mommy US
50-Pieces of Waterproof Disposable Toilet Seat Covers, Individually Wrapped Paper Cover for Public Bathroom, Flushable Liners for Travel Accessories, Adults, Kids (17.5x14.5 in) - Walmart.com
Birth control turned my toilet seat blue (details in comments) : r/mildlyinteresting
Amazon.com: Ultimate Raised Toilet Seat with Handles, Bedside Commode, Padded, Armrests, Adjustable Height, Premium Elevated Toilet Seat for Elderly Bathroom Safety with Arms, Standard and Elongated Toilets, Blue : Health & Household