It does not matter which theme, every text-primary or nt-form__link class has the sky (#30bcff -> default $accent) color.
getting a look in scss, the color comes from @include colorize($color: accent);, but in the sample project uses the brown theme where $accent: const(lime); is set.
the -primary button seems correct (lime color)

Sample project
https://play.nativescript.org/?template=play-vue&id=xQPhCG