Using the Classroom Colors, it is very difficult to tell the E color from the F color, especially on the IFP big screen Chromebooks at school. Also the E is so light and bright that it is hard to look at and see accurately on the screen for many students.
Perhaps RGB#66CC33 for the F - it is a tad greener than what you have and not so light/bright as to make it hard to see (RGB#66FF00 is actually closer to the Boomwhacker's color but very bright and hard on the eyes on a big screen). Then for the E, a goldish color that isn't so bright RGB#CC9900 or RGB#CC9933 would be a nice option - the "mustard" currently leans a bit too much towards green.
It would also be nice to have the full chromatic spectrum for Classroom Colors. Keeping in mind a darker and less bright spectrum that is better for viewing notes on a screen than the actual Boomwhacker diatonic spectrum, but one that is still close, consider:
C=FF0000, C#/Db=990000, D=FF3300, D#/Eb=CC6600, E=CC9900, F=66CC33, F#/Gb=009933, G=009999, G#/Ab=0066CC, A=6600FF, A#/Bb=9900CC, B=FF00CC
With the chromatic spectrum, it does make it harder to create a nice balance from C to F if there is more differentiation between the E and F, but most teachers who use the Boomwhackers are not going to be using the chromatic spectrum that much, other than perhaps the Bb and F#, so not as critical. Using a black note head with the chromatic Classroom Color glow around it might work to alert students to playing an accidental (one of the black notes on the piano).
Note: an interesting paradox - the blue, purple, and teal appear darker than they are for print on the big screen, and need to lightened somewhat.
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