SonarQube Java Analyser, rule S2183, why should I remove this useless shift?

Question

I have written:

public static final int MY_GREAT_COLOR = (91 << 16) + (155 << 8) + 213 + (255 << 32);

And sonar says:

New: Squid:S2183 Severity: CRITICAL, Message: Remove this useless shift

Could anybody tell me why? Is that only the fact that there should be no calculations on literals, even if it adds to readability?

Answer 1

I guess 255 is your alpha channel, in that case I guess you wanted 255 << 24.

SonarQube doesn't know your intentions, but it has a valid point, as Toby stated.

As for readability, you can also try hexa code (e.g. 0xFF5B9BD5), many devs are used to that already. Of course, a decimal number would be totally unreadable and ugly.