Analogous color scheme (accented)
From Colorpedia
We can add the complement to an analogous color scheme to achieve additional accenting color. This color scheme is similar to the complementary color scheme, the complement works as the accent the same way, while the adjacent colors give more freedom to balance the basic design.
Example
Paletton usage
Within the Paletton application use the Adjacent colors (4-color) option with the complementary color switched ON.