Moderator Note
For those that are not familiar with it, this is the most common mnemonic that was taught in EE / tech schools for decades for the resistor code given in the OP.
Bad = 0 black
Boys = 1 brown
Ravish = 2 red
Our = 3 orange
Young = 4 yellow
Girls = 5 green
But = 6 blue
Violet = 7 violet
Gives = 8 gray
Willingly = 9 white
This is followed by a tolerance band which is typically either silver or gold.
So a resistor with brown black red gold would be 1 0 00 or 1k ohms, and the gold means 5 percent tolerance.
While this is by far the most common mnemonic used for resistor codes, it is considered extremely offensive today, especially with the much more common “Rape” instead of “Ravish” used for the color red. Some variants also use “black boys” instead of “bad boys”. I will leave this here for clarity and historical reference, but let’s refrain from posting this except in proper context (i.e. it is permissible to discuss the offensive or historical nature of it).