グレー展開

$gray-source#09264#09264E
$gray-500tint($gray-source, 65%) #A9B3C1
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$gray-50 tint($gray-500, 95%) #FBFBFC
$gray-100tint($gray-500, 90%) #F6F7F9
$gray-200tint($gray-500, 80%) #EEF0F3
$gray-300tint($gray-500, 65%) #E1E4E9
$gray-400tint($gray-500, 40%) #CBD1DA
$gray-600shade($gray-500, 10%) #98A1AD
$gray-700shade($gray-500, 25%) #7F8691
$gray-800shade($gray-500, 40%) #656B74
$gray-900shade($gray-500, 60%) #43474D
$gray-950shade($gray-500, 75%) #2A2D30

$primary-50: tint($primary, 95%);
$primary-100: tint($primary, 90%);
$primary-200: tint($primary, 80%);
$primary-400: tint($primary, 40%);
$primary-500: tint($primary, 65%);
$primary-900: shade($primary, 60%);
$primary-950: shade($primary, 75%);