Semantic theming - buttons and actions states

 While W3C button attributes and CSS has given straight forward combination of possible appearance of actions/buttons, not all have a "semantic" meaning for the user. There is a proposal for state sequence in colors escalation order ( see indexed palette article ).

NORMAL  (default)

FOCUSED  :focus css selector

SELECTED attribute on some elements like OPTION 

HOVER  :hover

ACTIVE :active

DISABLED attribute, not available on A element

Not all states would affect background and not on all action variations: focused is usually leaves the current appearance with outline, in ghost variation the background by default would be transparent still for accessibility reasons keeping palette changes for other states.

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