Hello again, rudyment.

Thank you very much for your feedback.

As you point out, currently Astah doesn't let you input RBG directly to set the color, only for HSB value and providing the color combo by our original theme instead.

We have not received much feedback on the color setting or color chooser box before, so it was very good to hear for us because it helps us review the feature that we haven't seen with a perspective to seek the potentials of improvements there for a long time.

Will add this on to our feature wish-list and consider the improvement in the future.
Thank you.

Satomi