Mnemonic Device:

• Better Be Ready Or Your Great Big Venture Goes West

Variations:

• Bill Brown Realized Only Yesterday Good Boys Value Good Work
• Bad Booze Rots Our Young Guts, But Vodka Goes Well
• Better Be Ready Or Your Great Big Plan Goes Wrong

Explanation: to remember the color bands on resistors in order of increasing magnitude.

• Numerically the value (0-9) of a resistor via the color-coded bands:
  • Black (0), Brown (1), Red (2), Orange (3), Yellow (4), Green (5), Blue (6), Violet (purple, 7), Gray (8), and White (9)
• Also, note that red through violet are the colors of the rainbow (in order). Although the ROY G. BIV mnemonic for rainbow colors includes indigo between blue and violet.