About Card Symbols
Eight of these nine characters are the four card suits in two forms: ♠ ♤, ♣ ♧, ♥ ♡, ♦ ♢. Unicode names the first of each pair "black" and the second "white", but those names describe fill rather than colour — the filled form is not necessarily black on screen, and that distinction causes most of the confusion people have with this collection.
"Black" and "White" Mean Filled and Hollow
In Unicode's naming conventions, black means solid and white means outlined. ♠ is the filled spade and ♤ the outlined one; neither name says anything about the colour they will be drawn in.
That colour is up to the font. All eight suit characters are classified as pictographic, and a number of platforms — particularly on mobile — draw ♥ and ♦ in red, since that is how a physical deck prints them. On other systems all eight render monochrome and follow the colour of your text.
The practical consequence: if you need four suits that all match, test them where you intend to use them. A row that is uniformly black on a desktop can appear with two red suits on a phone.
Two Complete Sets for Two Tiers
Having each suit in filled and hollow form is genuinely useful for the same reason the chess pieces are on the royal symbols page — you get two visual weights of the same shape without introducing a second symbol.
For a card-themed clan or server, filled suits for one tier and outlined suits for another gives a consistent system that reads without explanation.
♥ and ♡ also appear among the heart symbols, since the same two characters serve both purposes.
The Joker, and the Rest of the Deck
🃏 is the only emoji here, drawn in fixed colour by your device, and the only character on this page that a name field filtering emoji will reject.
Unicode does encode a complete playing card deck — every rank of every suit as an individual character — in a separate block. Those characters have poor font coverage on most systems and commonly appear as empty boxes, which is why this collection stays with the suits.