🟥 Red Square

Unicode lists 🟥 Red Square among the shapes in the Symbols group. It usually appears in messages about card, penalty, red and square.

🟥 works in messages, comments, captions and profile names. On SmileyZone it is filed under Symbols and Signs. It joined the standard with Emoji 12.0 in 2019, so support on current devices is reliable. Its code point is U+1F7E5.

• 🟥 on its own already flags the topic: card.
• Fits messages about card, penalty, red and square.
• Often seen near 🟧 Orange Square, ⚫️ Black Circle and ⚪️ White Circle.

• 🟥🔵 – Red Square and Blue Circle
• 🟥🟢 – Red Square with Green Circle
• 🟥🟫 – Red Square plus Brown Square
• 🟥🟦 – Red Square and Blue Square
• 🟥🟨 – Red Square with Yellow Square
• 🟥🟧 – Red Square plus Orange Square

Easy to mix up with 🟧 Orange Square, ⚫️ Black Circle or ⚪️ White Circle. They sit in the same Unicode subgroup and look similar at small sizes, so it is worth checking the name before sending.