Tap the bits on and off
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Binary & Hex Tips
💡 It's Just On and Off
Computers store everything using tiny switches that are either on (1) or off (0) — a number written using only 0s and 1s is called binary.
🔟 Each Place Doubles
In our normal numbers, each place is worth 10 times the one before (1, 10, 100...). In binary, each place just doubles: 1, 2, 4, 8, 16, 32, 64, 128.
🍫 Hex: a Shortcut for 4 Bits
Hexadecimal (hex) counts in 16s instead of 10s, using 0-9 then A-F for 10-15. One hex digit always represents exactly 4 bits — that's why the Bit Builder above splits into two groups of 4, one for each hex digit.
🎨 Hex Colors
Website colors are written in hex, like #FF0000 for red — two hex digits each for how much red, green, and blue to mix in.