Blue works. I recommended Splash since it will yield 100% Blue offspring when crossed over a Barred bird, such as a Rock. Blue would yield 50% Blue and 50% Black offspring. Mind that any female Barred bird will work for a sex link cross. Barred Rock is only a common example. Sex linkage is based on genes, not breeds.
Barred birds are genetically very simple. They're a pure black bird (so E/E pattern gene base with various Unknown melanizers to make a pure, solid black bird) with the Barring gene over top. Ignoring the Barring gene for a moment, you have a simple black bird. This black bird will interact the same way with the Blue gene as any other black bird. So you'll get:
Blue X Blue: 50% Blue, 25% Black, 25% Splash
Blue X Black: 50% Blue, 50% Black
Black X Black: 100% Black
Blue X Splash: 50% Blue, 50% Splash
Splash X Splash: 100% Splash
Splash X Black: 100% Blue
Add the Barring gene back in, and you'll get all the same outcomes, except some or all of them will be Barred as well.