Describe the bug
Incorrect colours for the block social icon backgrounds as they relate to each social platform. I'm currently testing WordPress 5.4 RC1.

Expected behavior
Recommend either using a single colour, otherwise if the idea is to match the colours to the social networks, best to use their actual colours.

Example
Facebook colour in the block uses this HEX colour: #1977f2
The official colour for Facebook is: #3b5998

Additional context

• Using and testing the WordPress 5.4 RC1 version.