I forgot to mention quantity of fluid. Much is often wasted due to not knowing when to stop bleeding at a given wheel. This waste can be avoided by using Ate Super Blue Racing Fluid, if available in your area. Blue fluid at the bleeder is new fluid.

It costs about $10 per liter but exceeds Volvo requirements, and one liter will be more than enough — unless you are using a pressure bleeder with a 2 liter, opaque reservoir, where there is danger of running low and introducing air, when only 1 liter of fluid gets low.

That means you'd need 2 liters to be safe, which would negate the potential saving to be gained by the color change at the bleeder. However, I get by on less than 1 liter because I simply pressurize the MC with a small hand air pump. I do have to keep watch on the MC fluid level, and replenish 2 or 3 times on a complete sequence, but I consider that a small inconvenience to pay for the efficient use of fluid and having no clean up afterward.
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Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.