Two colors beside each other and two contrast colors to those two colors on Color Wheel when applied with each other with their various shades in a layout then it is called a ' Double Complementary Color Scheme'.

Yellow Yellow-orange x Purple Blue-purple

While using this group try colors in proportion of 1:2:3:4.

One color on Color-Wheel and two colors beside the contrast color to that color when applied together in a layout then it is called a 'Split - Complementary Color Scheme'.
i.e. Yellow x Red-Purple Blue-Purple

* There is a risk of getting contradictory scheme through this group containing Secondary colors. If these colors are used with skill and with appropriate proportion then it can create a pleasant scheme.

When two colors beside each two-contrast color on Color-Wheel applied together in a layout then it becomes a 'Double - Split Complementary scheme'.
i.e. Yellow -Green Yellow-Orange x Red-Purple Blue-Purple