#1EB6E7

CSS

:root {
  --blue-bikini: #1eb6e7;
  --blue-bikini-rgb: 30 182 231;
  --blue-bikini-oklch: oklch(0.725 0.135 226.9);
}

.element {
  color: var(--blue-bikini);
  background-color: hsl(195 81% 51%);
  border-color: oklch(0.725 0.135 226.9);
}

Tailwind CSS v4

@theme {
  --color-blue-bikini: #1eb6e7;
  --color-blue-bikini-50: #cefdff;
  --color-blue-bikini-100: #baf1ff;
  --color-blue-bikini-200: #96e0ff;
  --color-blue-bikini-300: #65c5ee;
  --color-blue-bikini-400: #23addb;
  --color-blue-bikini-500: #0095ca;
  --color-blue-bikini-600: #007fab;
  --color-blue-bikini-700: #006589;
  --color-blue-bikini-800: #004b65;
  --color-blue-bikini-900: #003447;
  --color-blue-bikini-950: #001f2e;
}

SCSS

$blue-bikini: #1eb6e7;
$blue-bikini-rgb: 30, 182, 231;
$blue-bikini-light: mix(#fff, $blue-bikini, 20%);
$blue-bikini-dark: mix(#000, $blue-bikini, 20%);

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