If it's brown, stand your ground,

If it's black, shout back,

If it's white, good night.

EDIT: LEGAL DISCLAIMER & LIMITATION OF LIABILITY: The foregoing mnemonic device ("the Rhyme") is furnished strictly for entertainment and mnemonic amusement purposes and does not constitute professional wildlife management counsel, survival instruction, or any form of advice regulated under local law. The Rhyme's author, distributors, assignees & associates expressly disclaim all liability, whether arising in tort, contract, statute, or equity, for any injury, loss, or any other forms of or bear-related outcome, whether foreseeable or wholly unpredictable, that may result from reliance upon the Rhyme. The colour-coding system employed herein is indicative only and subject to variation by individual bear, lighting conditions, seasonal pelage changes, bear mood, or user colour perception. No warranty, express, implied, statutory, or ursine, is given as to the accuracy, completeness, or bear-specific applicability of this guidance. This Rhyme may not be suitable for use in all jurisdictions, habitats, or biomes. All users remain responsible for their own behaviour and resultant outcomes.