This is my color preset in Sketch app.
You can grab it if you like.
Copy and paste the following commands into Terminal and press return to run.
cd ~/Library/Containers/com.bohemiancoding.sketch3/Data/Library/Application\ Support/com.bohemiancoding.sketch3/
mv assets-v55.sketchpreset assets-v55.sketchpreset.backup
curl -O https://github.com/RayPS/my-sketch-colors/raw/master/assets-v55.sketchpreset
echo "All Done! Now restart Sketch app."
cd ~/Library/Application\ Support/com.bohemiancoding.sketch3/
mv assets-v55.sketchpreset assets-v55.sketchpreset.backup
curl -O https://github.com/RayPS/my-sketch-colors/raw/master/assets-v55.sketchpreset
echo "All Done! Now restart Sketch app."
You can also restore your colors if you regret it.
If you got any better ideas, Just send me a pull request or add an issue.