what is sRGB?

gamerbloke

Broken In
I have a Samsung syncmaster 793df 17" flat CRT monitor.
By accessing side button MENU i found an option sRGB OFF, if i ON it my screen becomes brighter and above it a thermometer looking thing with "K" beside it changes from 9300K to 6500K.
1)What is this option?
2)Should i keep it ON or OFF?
3)What is this 9300 & 6500K?
 
OP
G

gamerbloke

Broken In
Lol no one knows..... so if anybody knows this please solve it.
around 6 years back i got my intel motherboard repaired & assembling afterwards monitor's display turned yellow. Then around 3 yrs back it sometimes switched back to its original colours. Then again became yellowish permanently and recently i changed my desktop position and suddenly again original colours came back. now when i start pc it starts voilet or dark reddish and after 5-10 mins it comes back close to original colours.
 
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