diff --git a/jdaviz/configs/default/plugins/plot_options/tests/test_plot_options.py b/jdaviz/configs/default/plugins/plot_options/tests/test_plot_options.py
index 603e42bee3..556f5a1fd7 100644
--- a/jdaviz/configs/default/plugins/plot_options/tests/test_plot_options.py
+++ b/jdaviz/configs/default/plugins/plot_options/tests/test_plot_options.py
@@ -259,8 +259,8 @@ def test_apply_presets(imviz_helper):
     arr = np.arange(36).reshape(6, 6)
     po = imviz_helper.plugins['Plot Options']
 
-    preset_colors_4 = ["#0000FF", "#00FF00", po._obj.swatches_palette[1][0],
-                       po._obj.swatches_palette[0][0]]
+    preset_colors_4 = ["#0000ff", "#00ff00", po._obj.swatches_palette[1][0].lower(),
+                       po._obj.swatches_palette[0][0].lower()]
 
     # Test applying presets with < 6 layers
 
diff --git a/jdaviz/core/template_mixin.py b/jdaviz/core/template_mixin.py
index b21ba5bfac..7543e7c0d1 100644
--- a/jdaviz/core/template_mixin.py
+++ b/jdaviz/core/template_mixin.py
@@ -2982,6 +2982,10 @@ def _get_glue_value(self, state):
             return getattr(state, glue_name).name
         if glue_name in GLUE_STATES_WITH_HELPERS:
             return str(getattr(state, glue_name))
+        if glue_name == 'color':
+            # Set to lower() so that all linked states of a subset
+            # (data in viewer with this subset applied) have matching color values
+            return str(getattr(state, glue_name)).lower()
         if glue_name in ('contour_visible', 'bitmap_visible'):
             # return False if the layer itself is not visible.  Setting this object
             # to True will then set both glue_name and visible to True.