Warm your blue kitchen effectively by starting with lighting upgrades using 2700 to 3000 kelvin bulbs and high CRI. Next, swap nickel hardware for warm brass and add a runner rug with warm tones like rust or ochre. Then bring in wood accents and warm wall colors such as soft ochre. Finally, if needed, consider repainting cabinets or updating flooring. This step-by-step approach offers maximum warmth impact with minimal stress or expense.