/cgl/ - Cosplay & EGL

I'm very new to Japanese school uniforms, so maybe some of you anons who know more than I do can help.

Would you say the color of the blazers in the pic are navy or a different kind of blue? And if not navy, is there a specific name for the color in Japanese I should search for? Trying to figure out if I can just get a blazer from a Western shop or if I need to try some of the links in the spreadsheet. Thanks!