Create an image of a Space Marine from the Warhammer 40,000 universe standing in a customization screen within a video game. The Space Marine should be fully armored in blue power armor with gold and silver accents, featuring a fierce helmet with red eyes, shoulder pauldrons with a stylized 'U' symbol and a Roman numeral 'VI,' and a chest plate with a golden Aquila (eagle) symbol. The character should be standing confidently against a dark, foggy background. The game's HUD should be visible, showing the customization options for different armor parts such as the helm, pauldrons, breastplate, gauntlets, and greaves. The HUD should include labeled sections for these armor parts, and the overall aesthetic should be consistent with a sci-fi video game interface.