Possible Clues:

• Fellow from Riga, maybe, kind of blue
• Hans van Meegeren was proved to be a forger of Vermeer by his anachronistic use of ____ blue
• Element in some blue glassware
• Blue choice
• Metal; lab cot (anag.)
• Element Co
• Co-pilot finally completes putting fuel over nose of Boeing
• Metal key under sturdy mount
• To overcome Labour, Conservative turned blue
• — Blue