Prepare all gel food coloring diluted in small bowls of water before starting to knead, so you can work efficiently and avoid the dough from over-proofing while you're mixing colors.

Gel food coloring produces vibrant, true rainbow colors without adding excess moisture that would affect dough hydration, unlike liquid food coloring which can make the dough sticky and difficult to work with.

Divide your dough into six equal portions and knead each color in separately by hand rather than using a mixer—this prevents over-mixing and gives you better control over color intensity and even distribution.

After the first rise, gently stack each colored dough layer on top of the other, then roll tightly into a log to create beautiful rainbow spirals throughout the loaf when sliced.

Place your shaped loaf in a proofing box or large plastic bag with a damp towel to maintain consistent warmth and humidity, which ensures even rising and prevents the exterior from drying out and cracking.