For accessibility assignment, I looked into p5 editor with Colour Contrast Analyser (CCA). The CCA helps to figure out the legibility of text and the contrast of visual elements, along with further useful information like color blindness simulator.

p5 web editor and use of Colour Contrast Analyser (CCA)

The first input I tried on was contrast between grey text and lighter grey(?) background. I used the color picker, and it came out as #B5B5B5 for text (File, Edit, Sketch, Help&Feedback, Auto-refresh...etc) and#FBFBFB for background. Unfortunately, the contrast ratio was 2:1, which fulfill neither "minimum" nor "enhanced" standard for both large and regular text display.

p5 web editor and use of Colour Contrast Analyser (CCA) for point color

The good news is that p5's point color, #EA285F, which is often used for UI components and logo resulted enough ratio to satisfy Contrast(Minimum) for large text, and most importantly, passed the Non-text Contrast. On the other hand, although the same pink color is used for hover text - it still fail for regular text contrast.