Change save button contrast as global color edit

[lidel]

(this may be subjective), but the "Save" button on "Settings" screen in "active" state (when config was changed but not saved yet) feels pretty "inactive":

Ref. how similar problem was fixed in ProtoSchool/protoschool.github.io#317

[ericronne]

It's not your imagination @lidel. At about 1.9:1, the contrast ratio for the teal button label is way below the 4.5:1 standard. (Whereas the text on the gray button clocks in at an impressive 8.8:1)

#378085 is one color that works

[lidel]

Thank you @ericronne! Do you think this color is generic enough to be added to ipfs-css and used across our apps in cases like this, or should we punt this until we have time to refresh https://github.com/ipfs/ipfs-gui/blob/master/img/ipfs-ui-kit.png and see how the bigger picture looks like?

[ericronne]

I think it would be safe to globally swap in #378085 for the #3e9096 on the webui palette. Without actually trying it, it's tricky to know if there's a color combo in some distant corner of the UI will look a little off because of this. Seems like a pretty safe bet, tho.

[jessicaschilling]

I'm going to change the color value in ipfs-shipyard/ipfs-css#40 -- once that's merged, OK to update the button itself from aqua to teal.

[jessicaschilling]

ipfs-css has been updated to 1.0.0! Ready to integrate this change.