Hi- I work for Rubin Observatory and we are currently developing an online classroom activity, Coloring the Universe, which has a six-color tool to create astronomical images. We would like to test this with users who have color vision deficiency to get feedback on what color choices and options work best for them. As this new school year begins, if you or some of your students can help give feedback, please contact me: firstname.lastname@example.org. We will be accepting input until the end of November. Thank you!