Change text styles on different 7.1 color schemes (light, lightest, bright, dark, darkest)

I've set my h2 bolded to have a turquoise highlight effect, but what do I need to add to this code to specify the Squarespace color scheme/profile? For example, I'd like the code below to work on lightest, lightest-bold, light, light-bold, bright, brightest-bold, but then CHANGE the color for dark, dark-bold, darkest, darkest-bold

h2 strong {
  background: linear-gradient(180deg, #29d2c9-5, #29d2c9);
  display: inline;
  line-height: 1.6;
  text-transform: uppercase;
  letter-spacing: 0.10em !important;
}

Thanks!

try

.light-bold h2 strong {
  background: linear-gradient(180deg, #29d2c9-5, #29d2c9);
  display: inline;
  line-height: 1.6;
  text-transform: uppercase;
  letter-spacing: 0.10em !important;
}

Thank you, @tuanphan!