With the 1.20 update, there is some new features to the /effect command, which is pretty good, but with the new infinite time value, the color of the rest of the options are displaced by one compared to the normal colored options.

It's because like infinite take no color (grey), it will be the next value that will take the green color, so it's the amplifier that will be green color(instead of purple) and so the color of hideParticles value will be purple (instead of orange).