Triadic color scheme
Triadic scheme (or a triad) is a special variant of the split contrast color scheme, with the equal distance between all colors. All three colors are distributed evenly around the color wheel, causing there is no clear dominance of one color. The scheme is always vibrant and colorful, designers should use it and balance very carefully to maintan the desired effects and color meaning.
Any set of shades of all three colors could be used with a triad, but the strongest effect and most vibrant palettes are produced with bold, saturated shades.
Within the Paletton application there is the Triade (3-color) option (without a complementary color), to create split-contrast schemes. It's the same option for both split-contrast and triadic scheme (as triadic is split-contrast with distance set to 60°).
Set the distance from the base color complement by dragging one of those two supplement color, or by clicking the angle gadget and entering the value manually. The desired value to get a triad is 60°.