Graphs – Contrast b/w colors are eye soothing colors

I have recently had a chance to work on graphs and charts, and I'm facing a problem when there are a lot of bars in a chart or stacked bars in a graph.

Should we consider going with eye soothing colors which don't really affect users? Or should we make it clear by using the colors which have enough contrast between them, instead of going with different shades on the same color?

Which would be a better experience to the user? Should colors match with the style guide colors of the platform, or can they have a different set of colors?

Edited : Below is new color scheme which made