Stroke Circles

Border solid color

border: 0.1rem solid #DEDEDE;

Border color alpha

border: 0.1rem solid rgba(0,0,0,0.2);

Box-shadow solid color

box-shadow: 0 0 0 0.1rem #DEDEDE;

Box-shadow alpha color

box-shadow: 0 0 0 0.1rem rgba(0,0,0,0.2);

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