Visual: Banner color update from black to blue

[mareekuh]

In the visual alignment review of the FUSE products and the deltas with the Fluent style guide Composer did very well. There were a few areas where we're unnecessarily different:

1. Banner color (currently black) and
2. Icon in the upper left : we have our custom icon, Fluent apps have the 9 grid which on click brings a pane with 1 click access to related products.

Number 2 does not seem a reasonable one to introduce at this time.
Could we do 1?

@DesignPolice - could you include a pointer to the design?

[DesignPolice]

Hey Chris here is the update on this...

We can just change the color Phase 1 for now, but I have added the Phase 2 - for reference when we are ready to use the Waffle menu, add Search and take off the Icon.

Figma Link

https://www.figma.com/file/LlTlh5vXwq91zjGnFtrUUR6l/Composer-master-design-spec-UI-library?node-id=1929%3A13

Screen Shot

[mareekuh]

Thanks @DesignPolice and @cwhitten - that would be great (Phase 1 for now).

[cwhitten]

addressed via #2779