1st - Okiku vs. Kanjuro clash and the lightning bolts from the clash are yellow.
Big Mom bursts through the wall with Conqueror's Haki, her lightning bolts are pink in color, we also see this in Whole Cake Island (WCI).
Note that Zeus was unconscious, so there's no way these lightning bolts could have come from him.
When Yamato launches her attack directed at one of the Numbers, the blue color is emitted from her arms.
When Kaido unleashes his attack of invisible blades, he displays the same blue color as Yamato, but on a larger scale.
Kaido emitted a purple color in chapter 923.
Yellow color by Kaido.
Black and red with Kaido and Oden.
Kaidou and Big Mom are all red or red and black?