[BITV] Contrast ratio is a general issue with white on our default blue

[PVince81]

"The contrast ratio is a general issue with white on our default blue, we only pass AA with large text"

Need to check if this still applies with the new design and if yes, what changes are required to fix this.

@jancborchardt @nimishavijay

[Pytal]

Before	After

Done in #34298