Black Bands Problem

[esgarlock]

Going through GlobeCorr with Justin Cook, came across this (he was using a MacBook Pro, 2016 OS Catalina with Chrome Browser).

• Uploaded sample_small.csv
• Clicked on positive correlation colour
• Clicked on the colour slider and chose a new colour
• Clicked on palette, one band goes black on the globe. We now have some bands that are the positive colour, all the negative bands are a colour, but there is one black band. When you hover over this band the label that should come up is also all blacked out so you can’t read it. (see below)

We were able to replicate the problem going through the same steps

• We were also able to “build on” this problem and create more black bands by clicking on the palette some more.

[innovate-invent]

I wonder if this is related to brinkmanlab/IslandCompare#177

[innovate-invent]

Looks like there is a math issue when picking colors. @mariamarab I am not sure how you decided on this equation:
https://github.com/brinkmanlab/exposomeglobe/blob/dd15f72d1f34ab8bf965c79c79354eaae9368ce9/src/components/ExposomeGlobe.vue#L38-L41

If intensity is >0.75 and a color component is a low value, say r=1, the color will be negative. The only valid color values are between 0 and 255.