requirements for harmonic colors

[pixelzoom]

Related to #4.

In the Java version, menu item Options > Harmonic Colors... opens this dialog to change harmonic colors:

• Is a UI like this desired in the HTML5 version? Can it be added to the standard Options dialog?
• Does PhET have a color chooser?
• Should colors be global to all screens?
• Should it be possible to globally change colors via PhET-iO?
• Is it feasible to use ColorProfile, which doesn't support "array of color Property", and doesn't instrument its color Properties (see PhET-iO instrumentation for ColorProfile scenery-phet#515)?

[pixelzoom]

Assigning to @arouinfar @ariel-phet and @kathy-phet so they can think about this before design meeting, and provide input before the meeting if they feel like it.

[ariel-phet]

IMO having any kind of custom color option is NOT desirable for the HTML5 version. It seems like added complexity that is unnecessary and does not fit a pedagogical goal. I think we should be choosing a set of colors that works well for contrast and color blindness and stick with those.

I do not even think these colors should be "easily edited" with iO for the same reasons. That seems like a "bell and whistle" that is potentially problematic.

[pixelzoom]

11/12/2020 design meeting with @arouinfar @kathy-phet @samreid @pixelzoom

• We will not have a UI for changing colors.

• We will not allow colors to be changed via PhET-iO.

• We will use a ColorProfile in this sim, to facilitate tweaking colors via fourier-making-waves-colors.hmtl. See create a ColorProfile for this sim #10.

• We noted that ColorProfile should be used in all new sims, to support future PhET-iO and a11y needs. @kathy-phet asked me to create an issue for developer meeting, see use ColorProfile in all new sims scenery-phet#642.