If you want to change color of text on contact form then follow this
1. open Asset->theme.scss->add this code at bottom of file
Send me other pages where you want to change color too.
That did change the color of text for the contact us fields.
But the color of text for the Page title is still an dark grey.
The other page I needed to change of the color of all text on the page is called "Why-you-truly-care!-Big"
Page handle = why-you-truly-care-big