Yicong-Huang commented on PR #8552:
URL: https://github.com/apache/texera/pull/8552#issuecomment-5733229833

   Not a blocker for this PR and not in its diff, but since it touches the 
heat-map overlay: the operator fills read as quite saturated on the canvas.
   
   The ramp in `heatmap-color.ts` is a reasonable choice in itself (ColorBrewer 
RdYlBu reversed, colorblind-safer than a rainbow). Two things push it brighter 
than the reference palette, though: the cold end sits at 59% saturation where 
ColorBrewer's own `#4575b4` is 45%, and the midpoint `#ffffbf` is pure yellow 
at 100%.
   
   The larger factor is probably not the ramp but how it is applied. 
`joint-ui.service.ts:537` uses the color as an opaque fill across the whole 
operator box, while the same ramp in the thin legend bar does not read as harsh 
at all. Blending the fill toward white (roughly 35%) would keep the hue 
separation and the colorblind-safe property, take the edge off the canvas, and 
improve label contrast on top of the fill.
   
   Entirely out of scope here, so no action needed on this PR. Happy to open a 
separate issue for it if that is preferred.


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