#616D7C

CSS

:root {
  --ashen-whisper: #616d7c;
  --ashen-whisper-rgb: 97 109 124;
  --ashen-whisper-oklch: oklch(0.53 0.028 254.1);
}

.element {
  color: var(--ashen-whisper);
  background-color: hsl(213 12% 43%);
  border-color: oklch(0.53 0.028 254.1);
}

Tailwind CSS v4

@theme {
  --color-ashen-whisper: #616d7c;
  --color-ashen-whisper-50: #f0f6fd;
  --color-ashen-whisper-100: #e2e8f1;
  --color-ashen-whisper-200: #cdd5e0;
  --color-ashen-whisper-300: #aeb8c6;
  --color-ashen-whisper-400: #93a0af;
  --color-ashen-whisper-500: #7a8899;
  --color-ashen-whisper-600: #677381;
  --color-ashen-whisper-700: #525c67;
  --color-ashen-whisper-800: #3c434c;
  --color-ashen-whisper-900: #292e35;
  --color-ashen-whisper-950: #171b20;
}

SCSS

$ashen-whisper: #616d7c;
$ashen-whisper-rgb: 97, 109, 124;
$ashen-whisper-light: mix(#fff, $ashen-whisper, 20%);
$ashen-whisper-dark: mix(#000, $ashen-whisper, 20%);

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