[Colors]: Secondary color should not look bad when used next to the primary color

[fallaciousreasoning]

In Chromium, the Secondary color is used in dark mode in a bunch of tonal values - this does not look great
brave/brave-browser#41125

We should change the Nala secondary color to something we can safely use by default 😄

If we don't we're going to be going against the grain in Chromium, and its going to make our lives harder.

Example screenshots:

[aguscruiz]

@fallaciousreasoning this one is gonna be a problem 😬.

Do you know if chromium is using the same value for primary/secondary in their themes? I can't really tell but it seems like it's a different shade of blue between primary/secondary.

Good call on disabling the tonal in the meantime, but I don't really understand how chromium intends to use the primary/secondary combination there in just the outline of the buttons? That's super weird to me. I don't see how their color combinations would look ok either unless it's the same value