A paired fixture for colored side borders and rounded accent borders. The left column should produce border findings; the right column should stay clean.
Classic side tab: border-left is thick, colored, and paired with rounded corners.
The right-side version is the same visual trope mirrored.
A thick chromatic side stripe still reads as a tab even without rounded corners.
A heavy top accent on a rounded card is the horizontal variant of the same pattern.
The bottom accent is also a decorative stripe on a card surface.
Dark surfaces can hide the cliche, but the thick colored side stripe remains.
A quiet all-around border frames the card instead of creating a side tab.
A gray structural rule can be a legitimate divider when it is not chromatic emphasis.
A 1px colored rule is below the decorative side-tab threshold.
A top rule without rounded card corners is treated as a structural divider.
A bottom rule without rounded card corners is also allowed.
The dark surface has a full neutral outline, not a chromatic side stripe.