0-100 are valid values. Most RGB bulbs operate using Hue/Sat to set color instead of the hex representation of RGB, so that’s the format used in most device handlers. The color value in Rule Machine represents the Hue value (and assumes 100 Sat for full colors).
I believe Rule Machine also allows for Red and Green to be selected directly instead of custom color values, so that might be easier. Alternatively, you could find the colors you want with your bulb, then record the Hue values at those colors and use them.