Uncertain Grey

CSS

:root {
  --uncertain-grey: #a9b0b1;
  --uncertain-grey-rgb: 169 176 177;
  --uncertain-grey-oklch: oklch(0.752 0.008 207.1);
}

.element {
  color: var(--uncertain-grey);
  background-color: hsl(187 5% 68%);
  border-color: oklch(0.752 0.008 207.1);
}

Tailwind CSS v4

@theme {
  --color-uncertain-grey: #a9b0b1;
  --color-uncertain-grey-50: #f3f6f6;
  --color-uncertain-grey-100: #e5e9e9;
  --color-uncertain-grey-200: #d0d5d6;
  --color-uncertain-grey-300: #b3b8b9;
  --color-uncertain-grey-400: #99a0a1;
  --color-uncertain-grey-500: #808889;
  --color-uncertain-grey-600: #6d7374;
  --color-uncertain-grey-700: #575c5d;
  --color-uncertain-grey-800: #3f4344;
  --color-uncertain-grey-900: #2c2e2f;
  --color-uncertain-grey-950: #191b1b;
}

SCSS

$uncertain-grey: #a9b0b1;
$uncertain-grey-rgb: 169, 176, 177;
$uncertain-grey-light: mix(#fff, $uncertain-grey, 20%);
$uncertain-grey-dark: mix(#000, $uncertain-grey, 20%);

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