Blue Period

CSS

:root {
  --blue-period: #075158;
  --blue-period-rgb: 7 81 88;
  --blue-period-oklch: oklch(0.398 0.066 205.3);
}

.element {
  color: var(--blue-period);
  background-color: hsl(185 85% 19%);
  border-color: oklch(0.398 0.066 205.3);
}

Tailwind CSS v4

@theme {
  --color-blue-period: #075158;
  --color-blue-period-50: #e1fbff;
  --color-blue-period-100: #d0eff3;
  --color-blue-period-200: #b5dde3;
  --color-blue-period-300: #90c1c9;
  --color-blue-period-400: #6faab1;
  --color-blue-period-500: #4c939b;
  --color-blue-period-600: #417c83;
  --color-blue-period-700: #346369;
  --color-blue-period-800: #24494c;
  --color-blue-period-900: #183335;
  --color-blue-period-950: #091e20;
}

SCSS

$blue-period: #075158;
$blue-period-rgb: 7, 81, 88;
$blue-period-light: mix(#fff, $blue-period, 20%);
$blue-period-dark: mix(#000, $blue-period, 20%);

.element {
  color: $blue-period;
  box-shadow: 0 0 0 2px rgba($blue-period, 0.35);
}