Oven interiors vary by manufacturer
Cavity colour, coating and construction differ across brands and models. Some use enamel finishes in colours such as blue, but there is no single industry-wide reason that explains every design choice. Check the model manual or product information for details.
Do not infer performance from colour
A blue appearance does not by itself prove faster preheating, better heat reflection, energy savings, non-stick performance or a particular safety property. Use the manufacturer's specifications for the appliance rather than general claims about colour.
Clean the cavity according to the manual
Before cleaning, check whether the oven has a self-cleaning function and which products or methods are permitted. Avoid abrasive pads, caustic cleaners or steam unless the maker explicitly allows them. Let the appliance cool and follow all safety directions.
When to seek appliance advice
If the coating is chipped, flaking, discoloured or damaged, consult the manufacturer or an authorised appliance technician. Do not scrape or treat a damaged lining with an improvised cleaner.
