This card keeps things stripped back: bold navy-blue type on a clean white background, with a oversized "1" and the word "DAD" sitting front and center. A single gold line cuts through the layout as the only ornament. There are no illustrations, no patterns, no fussy borders — just the letters doing the work. The navy and gold together read as intentional without being flashy. The white space around the type gives the whole thing room to breathe. The overall feeling is quiet confidence — something that lands as sincere rather than loud or sentimental.
This card suits your dad who is not a man of many words himself — the one who fixed your bike without being asked and never brought it up again. He would find a glittery card embarrassing. This design gives him the credit without overdoing it. It also works well for a father-in-law you respect but don't know well enough to go personal — someone like your wife's dad who coaches youth football on weekends and keeps things low-key. The directness of the typography does the work that you might not have words for yet.
Because the card's palette is navy, gold, and white, photos with dark clothing or outdoor evening light tend to look sharp against that backdrop when the recipient opens the card on screen. A candid shot of him at a backyard barbecue, tongs in hand, works well here. So does a photo from a fishing trip — water and overcast sky carry the same quiet tone as the design itself. If you have a picture of him with his own dad, that one is worth adding; the recipient can download every photo at full original resolution directly from the card.