A colorless version of the logo is particularly used on a local homepage in recognition of a major tragedy , often for several days . The design was apparently first used on the Google Poland homepage following the air disaster that killed , among others , Polish President Lech Kaczyński in April 2010 . A few days later , the logo was used in China and Hong Kong to pay respects to the victims of the Qinghai earthquake
the air disaster
2010 Polish Air Force Tu-154 crash
Google logo