Do you want to request a feature or report a bug?
bug
What is the current behavior?
Some of the default yarn output colors are not compatible with the popular Solarized Dark theme.

(Highlighting reveals the hidden output)

If the current behavior is a bug, please provide the steps to reproduce.
yarn to install/sync new packages in any given project.What is the expected behavior?
I should be able to read all of the yarn output easily by default when using a Solarized Dark theme.
Please mention your node.js, yarn and operating system version.
OSX 10.11.6
Node v6.9.1
Yarn v0.16.1
npm/npm#12843 is a good reference for how this issue was resolved for npm. 馃槃
This chalk issue recommends using dim instead of grey for coloring. I can try my luck with a PR to see if that works.
Sure @tribou, send a PR!
This sounds like a bug with Solarized Dark rather than with Yarn (seems like it's overriding some colours but not all, or something like that?), but nonetheless thanks for the pull request! 馃槃
@Daniel15 You are definitely correct! Unfortunately, the infamous issue altercation/solarized#220 from September of 2012 is evidence that this may not be resolved on the solarized side any time soon. 鈽癸笍 This has been an issue with so many projects over the years (mochajs/mocha#802, expressjs/express#1700, yeoman/generator#397, chalk/chalk#40, npm/npm#12843, gulpjs/gulp#654, hapijs/lab#592... just a quick survey 馃槃 ).
There was talk of forking the solarized project lately in altercation/solarized#355, so we'll see if anything else happens soon...
Thanks for the very thorough comment, @tribou! I appreciate the insight :) Hopefully someone forks Solarized and fixes it... It seems silly for every single project to have to adjust their colours just because one theme is not configured properly.