The color wheel is the shared foundation
Every one of these schemes is really just a different rule for picking points around the same circular color wheel, where hue is represented as an angle from 0 to 360 degrees. Complementary picks one point directly opposite; analogous picks nearby points; triadic picks evenly spaced points. Understanding the wheel makes it clear why each scheme produces the visual feeling it does.
Hue, saturation, and lightness are controlled separately
Most generators work in HSL (hue, saturation, lightness) color space rather than RGB, because HSL makes it far easier to rotate a hue around the wheel while independently adjusting how vivid (saturation) or how light/dark (lightness) each resulting color is β which is exactly what tone-on-tone palettes rely on.
Frequently Asked Questions
Which palette type should I use for a website?
Analogous or tone-on-tone palettes generally work well for calm, professional-feeling backgrounds and layouts, while a complementary accent color layered on top is a common way to make buttons or key actions stand out without clashing with the rest of the design.
Why do two colors that look fine individually sometimes clash together?
Colors that are close on the wheel but not quite analogous, or that share similar saturation and lightness without a clear relationship, can create visual tension without any obvious harmony. Following an established color theory rule, rather than picking colors that each look nice alone, is what keeps a full palette feeling intentional.