feat: use brand color for charts

[florian-lefebvre]

let me know what you think, i think it works okay because it more brown than orange

Checklist

• If updating UI/UX components ensure you have added screenshots or a gif or video of the changes to the PR description
• If this is a dependabot PR that bumps a metaframework version, ensure that all package versions in the package match the versions installed by the metaframework version being bumped
• If this is a dependabot PR that bumps a metaframework version in a starter-* package, ensure that the deps, and file content matches the output of the metaframeworks recommended starter/default project

[43081j]

i think we need to rethink the brown colour a bit...

basically its meant as an accent colour in e18e, but in this site we're using it a lot and now as a block colour.

we should probably rethink the styles - change the header to not be brown, the bars to be some other subtle colour, etc. leaving the brown for accents like active links etc.

[florian-lefebvre]

Closing in favor of #334