Color, measured.
Navy and light blues carry the brand. Teal ties back to the logo ring. Pink and yellow come from the logo stripes — pink appears at most once per page, yellow essentially never outside the mark itself.
Core ink.
Navy is the brand. White is the canvas. Everything else supports.
Blue family.
The primary expressive color. Use the deep end for surfaces, the pale end for tints behind copy.
Teal & mint.
The brand's quieter side. Teal echoes the logo ring; mint backs anything labelled "active engagement".
Accent stripes.
Pink and yellow live in the logo. Pink can earn its way out — yellow cannot.
Combinations that work.
Three pairings cover most of the system. Stick to these and the brand stays itself.
The rules.
Three principles keep the system from drifting.
Reserve pink for the single most important CTA, or one mid-sentence emphasis. If you want two pinks, you've actually got zero.
If a layout works in navy on white before color is added, the color will land. If it doesn't, color won't fix it.
Flat fills only. Color combinations come from putting two flat tints next to each other — never from blending them.