diff --git a/plantcv/plantcv/transform/auto_correct_color.py b/plantcv/plantcv/transform/auto_correct_color.py
index 109bc38ec..68bd904b6 100644
--- a/plantcv/plantcv/transform/auto_correct_color.py
+++ b/plantcv/plantcv/transform/auto_correct_color.py
@@ -1,6 +1,6 @@
 # Automatically detect a color card and color correct to standard chip values
 
-from plantcv.plantcv import params
+from plantcv.plantcv import params, deprecation_warning
 from plantcv.plantcv.transform.detect_color_card import detect_color_card
 from plantcv.plantcv.transform.color_correction import get_color_matrix, std_color_matrix, affine_color_correction
 
@@ -28,7 +28,10 @@ def auto_correct_color(rgb_img, label=None, **kwargs):
     # Set lable to params.sample_label if None
     if label is None:
         label = params.sample_label
-
+    deprecation_warning(
+        "The 'label' parameter is no longer utilized, since color chip size is now metadata. "
+        "It will be removed in PlantCV v5.0."
+        )
     # Get keyword arguments and set defaults if not set
     labeled_mask = detect_color_card(rgb_img=rgb_img, min_size=kwargs.get("min_size", 1000),
                                      radius=kwargs.get("radius", 20),
diff --git a/plantcv/plantcv/transform/detect_color_card.py b/plantcv/plantcv/transform/detect_color_card.py
index dc4444cc4..aa098b7f9 100644
--- a/plantcv/plantcv/transform/detect_color_card.py
+++ b/plantcv/plantcv/transform/detect_color_card.py
@@ -6,7 +6,7 @@
 import cv2
 import math
 import numpy as np
-from plantcv.plantcv import params, outputs, fatal_error
+from plantcv.plantcv import params, outputs, fatal_error, deprecation_warning
 from plantcv.plantcv._debug import _debug
 
 
@@ -108,7 +108,10 @@ def detect_color_card(rgb_img, label=None, **kwargs):
     # Set lable to params.sample_label if None
     if label is None:
         label = params.sample_label
-
+    deprecation_warning(
+        "The 'label' parameter is no longer utilized, since color chip size is now metadata. "
+        "It will be removed in PlantCV v5.0."
+        )
     # Get keyword arguments and set defaults if not set
     min_size = kwargs.get("min_size", 1000)  # Minimum size for _is_square chip filtering
     radius = kwargs.get("radius", 20)  # Radius of circles to draw on the color chips