diff --git a/lambda/pyproject.toml b/lambda/pyproject.toml
index 7b148b26..4cdfb0ca 100644
--- a/lambda/pyproject.toml
+++ b/lambda/pyproject.toml
@@ -4,7 +4,7 @@ version = "0.2.0"
 requires-python = ">=3.12"
 dependencies = [
     "data-hub-shared",
-    "arcadia-microscopy-tools>=0.3.2",
+    "arcadia-microscopy-tools>=0.4.1",
     "aws-lambda-typing>=2.20.0",
     "click>=8.1",
     "matplotlib>=3.8",
diff --git a/lambda/src/data_hub_lambda/hina_microscope/image_processing.py b/lambda/src/data_hub_lambda/hina_microscope/image_processing.py
index 4ff17f53..dbfedf68 100644
--- a/lambda/src/data_hub_lambda/hina_microscope/image_processing.py
+++ b/lambda/src/data_hub_lambda/hina_microscope/image_processing.py
@@ -64,7 +64,7 @@ def _render_rgb(self) -> NDArray[np.float64]:
         """Produce the RGB overlay for the loaded image."""
         per_channel_2d: dict[Channel, NDArray[np.float64]] = {}
         for channel in self.image.channels:
-            intensities = self.image.get_intensities_from_channel(channel)
+            intensities = self.image.get_channel_intensities(channel)
             reduced = self._reduce_to_2d(intensities, self._non_channel_axes())
             per_channel_2d[channel] = _rescale_percentile(reduced, CONTRAST_PERCENTILES)
 
diff --git a/lambda/src/data_hub_lambda/hina_microscope/parse_metadata.py b/lambda/src/data_hub_lambda/hina_microscope/parse_metadata.py
index a2fa506b..8fa94e76 100644
--- a/lambda/src/data_hub_lambda/hina_microscope/parse_metadata.py
+++ b/lambda/src/data_hub_lambda/hina_microscope/parse_metadata.py
@@ -26,7 +26,7 @@ def parse_metadata(image: MicroscopyImage) -> dict[str, Any]:
 
 
 def _channel_to_dict(channel: Channel) -> dict[str, Any]:
-    color = channel.color.hex_code if channel.color is not None else None
+    color = channel.color.lower()
     return {
         "name": channel.name,
         "excitation_nm": channel.excitation_nm,
diff --git a/lambda/tests/hina_microscope/test_parse_metadata.py b/lambda/tests/hina_microscope/test_parse_metadata.py
index a287fd1e..4960eac3 100644
--- a/lambda/tests/hina_microscope/test_parse_metadata.py
+++ b/lambda/tests/hina_microscope/test_parse_metadata.py
@@ -121,18 +121,18 @@ def test_channel_without_wavelengths(self) -> None:
         assert result["emission_nm"] is None
         assert result["color"] == "#ffffff"
 
-    def test_channel_with_none_color(self) -> None:
+    def test_channel_color_normalized_to_lowercase(self) -> None:
         from arcadia_microscopy_tools.channels import Channel
 
-        bare = Channel(name="CUSTOM", excitation_nm=500, emission_nm=520, color=None)
+        custom = Channel(name="CUSTOM", excitation_nm=500, emission_nm=520, color="#AABBCC")
 
-        result = _channel_to_dict(bare)
+        result = _channel_to_dict(custom)
 
         assert result == {
             "name": "CUSTOM",
             "excitation_nm": 500,
             "emission_nm": 520,
-            "color": None,
+            "color": "#aabbcc",
         }
 
 
diff --git a/uv.lock b/uv.lock
index 0a5c629b..da0492ec 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = ">=3.12"
 resolution-markers = [
     "python_full_version >= '3.14' and sys_platform == 'win32'",
@@ -40,21 +40,22 @@ wheels = [
 
 [[package]]
 name = "arcadia-microscopy-tools"
-version = "0.3.2"
+version = "0.4.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "arcadia-pycolor" },
     { name = "colour-science" },
     { name = "liffile" },
+    { name = "matplotlib" },
     { name = "nd2" },
     { name = "numpy" },
     { name = "pandas" },
     { name = "pydantic" },
     { name = "scikit-image" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8e/59/0be702d252c7bf935a9f4eca83db1435ab85b5da99575943810bdf35ea0f/arcadia_microscopy_tools-0.3.2.tar.gz", hash = "sha256:bf45a847b243aa1c364bc07a0e901dd8006e013dc5bbc2792f3408e9304ed8c9", size = 3326355, upload-time = "2026-03-23T22:50:35.672Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/6e/ce/41bdcc5b43e5dbe6cd9ab83e1ae43fc471e70b1e0291b863bd988f1cc32d/arcadia_microscopy_tools-0.4.1.tar.gz", hash = "sha256:dc5d3fb9150492b6b11a069dbe04a438f41a3e3865f4c9c5b2a33db31fdbad6b", size = 3166930, upload-time = "2026-06-09T17:44:17.935Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/8e/1a/d3297a140a1694b9a00707575ec7a8aac6d353fa43a57ca316124efd9839/arcadia_microscopy_tools-0.3.2-py3-none-any.whl", hash = "sha256:324a711d420921bbea9ceffc08f435ff0b91bf9471043c93ed661b0f32eb526b", size = 1863223, upload-time = "2026-03-23T22:50:37.26Z" },
+    { url = "https://files.pythonhosted.org/packages/71/e5/befbd426988321fb8f340f08dfd4fe52f2e5e74df966a918e8206830ab52/arcadia_microscopy_tools-0.4.1-py3-none-any.whl", hash = "sha256:3d55ce71c3a0e34f8c3f201974d47d1fbab3ee3db2f081b7f28b6a373496a146", size = 1866723, upload-time = "2026-06-09T17:44:19.454Z" },
 ]
 
 [[package]]
@@ -386,7 +387,7 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
-    { name = "arcadia-microscopy-tools", specifier = ">=0.3.2" },
+    { name = "arcadia-microscopy-tools", specifier = ">=0.4.1" },
     { name = "aws-lambda-typing", specifier = ">=2.20.0" },
     { name = "click", specifier = ">=8.1" },
     { name = "data-hub-shared", editable = "packages/shared" },