Internal change.

PiperOrigin-RevId: 559536314

Author: Material Eng

java/hct/Cam16.java

@@ -71,7 +71,7 @@ public final class Cam16 {
    * astar, bstar in code. CAM16-UCS is included in the CAM16 specification, and is used to measure
    * distances between colors.
    */
-  double distance(Cam16 other) {
+  public double distance(Cam16 other) {
     double dJ = getJstar() - other.getJstar();
     double dA = getAstar() - other.getAstar();
     double dB = getBstar() - other.getBstar();