intensify secondary color in platform theme

[Sebastian-ubs]

fixes https://github.com/paranext/ux/issues/201

Actual code change is 1 number, the rest is examples and build

before:

after:

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This change is 

[irahopkinson]

thanks for the highlight improvement and the examples

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

[tjcouch-sil]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @Sebastian-ubs)

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lib/platform-bible-react/src/index.css line 13 at r1 (raw file):

}

/* #region shared with https://github.com/paranext/paranext-extension-template/blob/main/tailwind.css */

Thanks for the update! Could you please also make this change in the template tailwind.css?