fix EDGECOLORS reference in workflow visualize

Author: Panaetius

CHANGES.rst

@@ -26,7 +26,7 @@ This is a bugfix release fixing an issue with cycle detection in workflows.
 Bug Fixes
 ~~~~~~~~~
 
--  **core:** prevent creating cycles when creating/executing workflows.
+-  **core:** prevent creating cycles when creating/executing workflows. Fix color in `workflow visualize`.
    (`#2785 <https://github.com/SwissDataScienceCenter/renku-python/pull/2785>`__)
 
 `1.1.3 <https://github.com/SwissDataScienceCenter/renku-python/compare/v1.1.2...v1.1.3>`__ (2022-03-25)

renku/core/commands/view_model/activity_graph.py

@@ -146,7 +146,7 @@ def _add_edges_to_canvas(
 
             colors = {e.color for e in intersecting_edges}
 
-            if len(colors) < len(EdgeShape.EDGE_COLORS):
+            if len(colors) < len(EdgeShape.COLORS):
                 while edge_color in colors:
                     edge_color = EdgeShape.next_color()
                 for e in new_edges: