fix: ensure project names are readable in dark terminals

In terminals using a color scheme with a dark background, project names
could end up being unreadable because one of the hard-coded background
colors used for project names was black. Replacing black with blue
solves this problem while also ensuring that project names remain
readable in terminals with light backgrounds.

packages/vitest/src/node/reporters/renderers/utils.ts

@@ -223,7 +223,7 @@ export function formatProjectName(name: string | undefined, suffix = ' ') {
     .split('')
     .reduce((acc, v, idx) => acc + v.charCodeAt(0) + idx, 0)
 
-  const colors = [c.black, c.yellow, c.cyan, c.green, c.magenta]
+  const colors = [c.blue, c.yellow, c.cyan, c.green, c.magenta]
 
   return c.inverse(colors[index % colors.length](` ${name} `)) + suffix
 }