graphics - How to extract the color of the bar-stacked used in BulletGauge?

How can I extract the colors used by default in the BulletGauge?

Answer

Trace

A programmatic approach using Trace:

Trace[
  BulletGauge[{1, 1.8, 3, 3.4, 4, 5}, {2.4, 2.9}, {0, 3.5, 4.8}],
  _ColorData
] // Flatten // First

ColorData[63, 1]

Check:

ColorData[63, "ColorList"]

Related examples:

Spelunking

This can also be found by spelunking the definition of BulletGauge itself using tools from:

One find that the inner definition is Charting`iLinearGauge

Needs["GeneralUtilities`"]

PrintDefinitions @ Charting`iLinearGauge

Within that one finds a hard-coded color source:

Charting`padList[{{ColorData[63][#1] &, None}}, numvals]

Comments

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