CSS alpha(): serve davvero o è solo zucchero sintattico?

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Il testo analizza tre modi per ottenere una variante trasparente di un colore definito in una custom property CSS. Per anni la soluzione più diffusa è stata scomporre il colore in canali, con il limite di vincolare il formato colore e rendere il codice fragile. Le alternative moderne sono color-mix() con transparent, che miscela il colore verso la trasparenza, e i colori relativi, che ricostruiscono il colore in un'altra funzione impostandone l'alpha. La nuova funzione alpha() svolge esattamente il compito di impostare un'opacità, senza scegliere spazi colore né riscrivere i canali, rendendo il codice più leggibile.

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