The Oregonian has a big piece on Portland PD’s changes their uniforms, which includes a fun fact about SPD’s togs:
Seattle police, for example, wear a “French blue” shirt and dark trousers.
“I think there was some talk of possibly changing it, but it didn’t get much traction,” said Seattle Detective Mark Jamieson, department spokesman. “We’re certainly identifiable.”
Hillsboro police had worn the “Portland Blue” two-tone uniform, but gradually phased it out over two years, moving as well to the darker LAPD blue. Now only four top commanders still wear the old uniform.