When does the tide in Ruby change to "Low Tide"?

Question

Because of this video.I wanna know when it changes tide.

Answer 1

http://bulbapedia.bulbagarden.net/wiki/Shoal_Cave#Tides

That chart shows you when the tides change. The times are determined by the clock you set in your house in LittleRoot town.

Comments

In the chart,does light brown mean morning or afternoon?and does light blue mean morning or afternoon?

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It goes from midnight to 11:59PM, left to right.