After spending a few days feeling blinded by the default folder icons in Yosemite, I created copies of them with saturation set to -70, plus copies of the Dropbox and Dropbox Folder icons, plus a folder-style Home icon. I zipped them up with instructions for installing some or all of them with the free LiteIcon utility: https://dl.dropboxusercontent.com/u/271144/Darker Yosemite Folder Icons.zip Here's a preview: With these icons, and the Graphite appearance and highlight color in the General settings, and transparency turned off in the Accessibility pane, Yosemite looks very fine. EDIT: In case anyone wants to modify any other icons, I should have mentioned the rough-and-ready method I used to do this. i used Find Any File to locate each original icon; Cmd-I to Get Info on the icon; clicked the little image at the top of the Get Info screen and then Cmd-C to copy it to the clipboard. Then switched to GraphicConverter9, Cmd-J to create a new image from the clipboard; then Picture->Brightness/Contrast/Hue to change the saturation to -70; then Save in ICNS format to a convenient folder. Then dragged the new saved icon into the appropriate box in LiteIcon. Repeat until all the boxes in LiteIcon were filled. Click Apply Changes in LiteIcon. A real graphic designer would have done something a lot more careful and time-consuming to get the icons exactly right, and if someone posts better versions, I'll be very glad to have them. But these seem to do well enough for now.