New project, new website, which means new stylesheets. These resources will help you find a suitable color palette, and then use it with SCSS.
Color Scheme Resources
Color Scheme Designer – Hands down, the best feature is the ability to quickly preview a new color scheme in mocked up dark & light preview pages. Schemes can be generated from a color that you have, or generated randomly, by placing constraints. The utility exports to a variety of formats including hexidecimal, html/css, and Photoshop palette.
Adobe Kuler – Similar to the above utility, however Kuler will create color palettes from a photo, as well as provide searchable access to tons of palettes.
ColourCode – Probably the simplest utility to use, without lacking needed features.
SCSS Resources
SassMe – Great visual representation of the SASS operators [Darken/Lighten], [Desaturate/Saturate] and [Adjust Hue]. Begin with a color, and experiment.
Sass & Compass Color Functions – Complete explanations for all SASS & Compass color functions. Code & visual representations included.
Controlling color with Sass color functions – Thoughtbot wrote a short, but well written article detailing SASS color transformations, complete with code & resulting color examples.
Compass – Framework that leverages SCSS.