ReplaceColor

This is a Krokodove tool. The Resolve 21 manual briefly describes replacing a nominated source color; detailed control labels in this article are confirmed by archived Controls, Selection and Render screenshots. This supports a working sequence, but not a promise of exact RGB equality across versions, processing spaces and transparency conditions.

Source Color samples the original color; Destination Color is the target sample. Both expose Red, Green, Blue and Alpha. The presence of Alpha in the sample editor does not by itself prove that the chosen Color Space uses four-dimensional RGBA distance for pixel selection.

Correction offers Manual and Automatic. Manual exposes channel Correction controls and Match Source To Destination. Check the values after pressing the button and inspect the Viewer: the formula, recalculation details and Automatic behavior with animated samples are not established by these screenshots. The color-replacement exercises use fixed Automatic settings on clearly separated colors. The mask exercise retains Manual with zeroed channel corrections to inspect Selection.

Selection Type contains Around Source Color and Free Range. The former selects relative to the sample; the latter offers a free range. Lock range for all channels and Lock Softness link the corresponding settings; Red Range and Softness define the range and transition. Start with a narrow selection and inspect alpha instead of guessing the mathematical metric from the word Range.

Alpha Output=Selection writes the selection into the output image alpha channel. The output is still an image. For a subsequent blue mask input, explicitly add Bitmap with Channel=Alpha; do not connect Image Output directly to a mask port in the instructional graph. Processed Alpha is for the regular processed result and does not promise unchanged source alpha.

Render offers RGB, HLS, YUV, YIQ, CMY, HSV, XYZ and LAB, plus Pre-Divide / Post-Multiply. Color Space selects the tool processing space; it does not replace Color Space Transform or project color management. Pre-Divide / Post-Multiply concerns processing RGB relative to alpha, so translucent edges require separate comparison.

The old text mentioned a native Effect Mask, but its existence and exact name in the current version are not established by the available material. The reference records the confirmed image stream; spatial restriction is demonstrated with a separate masked Merge. This is an evidence boundary, not a claim that no native socket exists in any version.