Update js variables based on updated json on brand evolution branch

[brianacnguyen]

Update js variables based on updated json

• Also update tests

[georgewrmarshall]

Completed in these commits

• https://github.com/MetaMask/design-tokens/pull/692/commits/559ed13697ece7b2c1baf8b7f5faa8e7e34647b8
• https://github.com/MetaMask/design-tokens/pull/692/commits/79214f9e8ebdda1c6784da4b5dfaa114aa798ca6
• https://github.com/MetaMask/design-tokens/pull/698/commits/0dd8193e2b685d030d5d1059f61199b7599954c7