diff --git a/.github/workflows/build-client.yml b/.github/workflows/build-client.yml
index 762f7a27..edffd9d1 100644
--- a/.github/workflows/build-client.yml
+++ b/.github/workflows/build-client.yml
@@ -16,11 +16,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref }}
 
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v4
         with:
           node-version: 12
 
@@ -32,6 +32,6 @@ jobs:
           popd
 
       - name: Commit changes
-        uses: stefanzweifel/git-auto-commit-action@v4.9.0
+        uses: stefanzweifel/git-auto-commit-action@v5
         with:
           commit_message: "[skip ci] Commit latest build"
diff --git a/terracotta/client/app/src/colormap/colormaps.ts b/terracotta/client/app/src/colormap/colormaps.ts
index c721ec03..f9920fe2 100644
--- a/terracotta/client/app/src/colormap/colormaps.ts
+++ b/terracotta/client/app/src/colormap/colormaps.ts
@@ -5,6 +5,16 @@ export interface Colormap {
 }
 
 const COLORMAPS: Colormap[] = [
+    { 
+        displayName: 'Grays', 
+        id: 'grays', 
+        img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-grays-bar.png' 
+    },
+    { 
+        displayName: 'Grey', 
+        id: 'grey', 
+        img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-grey-bar.png' 
+    },
     { 
         displayName: 'Greys', 
         id: 'greys', 
@@ -395,11 +405,21 @@ const COLORMAPS: Colormap[] = [
         id: 'gist_gray', 
         img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-gist_gray-bar.png' 
     },
+    { 
+        displayName: 'Gist_grey', 
+        id: 'gist_grey', 
+        img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-gist_grey-bar.png' 
+    },
     { 
         displayName: 'Gist_yarg', 
         id: 'gist_yarg', 
         img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-gist_yarg-bar.png' 
     },
+    { 
+        displayName: 'Gist_yerg', 
+        id: 'gist_yerg', 
+        img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-gist_yerg-bar.png' 
+    },
     { 
         displayName: 'Hsv', 
         id: 'hsv', 
@@ -410,6 +430,11 @@ const COLORMAPS: Colormap[] = [
         id: 'jet', 
         img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-jet-bar.png' 
     },
+    {
+        displayName: 'Turbo',
+        id: 'turbo',
+        img_url: 'https://terracotta-python.readthedocs.io/en/latest/_images/cmap-turbo-bar.png'
+    },
     { 
         displayName: 'Nipy_spectral', 
         id: 'nipy_spectral', 
diff --git a/terracotta/cmaps/data/brbg_r_rgba.npy b/terracotta/cmaps/data/brbg_r_rgba.npy
index a5772e2a..9ea3e1c0 100644
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diff --git a/terracotta/cmaps/data/gist_grey_rgba.npy b/terracotta/cmaps/data/gist_grey_rgba.npy
new file mode 100644
index 00000000..2aed54a1
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diff --git a/terracotta/cmaps/data/gist_yerg_rgba.npy b/terracotta/cmaps/data/gist_yerg_rgba.npy
new file mode 100644
index 00000000..199aa1b0
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diff --git a/terracotta/cmaps/data/grays_rgba.npy b/terracotta/cmaps/data/grays_rgba.npy
new file mode 100644
index 00000000..515bf1a1
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diff --git a/terracotta/cmaps/data/grey_rgba.npy b/terracotta/cmaps/data/grey_rgba.npy
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index 00000000..2aed54a1
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diff --git a/terracotta/cmaps/data/piyg_r_rgba.npy b/terracotta/cmaps/data/piyg_r_rgba.npy
index bde0a106..5214f755 100644
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diff --git a/terracotta/cmaps/data/prgn_r_rgba.npy b/terracotta/cmaps/data/prgn_r_rgba.npy
index e344526a..b60c6bb9 100644
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diff --git a/terracotta/cmaps/data/rdbu_r_rgba.npy b/terracotta/cmaps/data/rdbu_r_rgba.npy
index 0d4c91e3..ca6ec42d 100644
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diff --git a/terracotta/cmaps/data/rdgy_r_rgba.npy b/terracotta/cmaps/data/rdgy_r_rgba.npy
index ae544674..6b56daa0 100644
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diff --git a/terracotta/cmaps/data/rdylbu_r_rgba.npy b/terracotta/cmaps/data/rdylbu_r_rgba.npy
index b9399f98..a276c178 100644
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diff --git a/terracotta/cmaps/data/rdylgn_r_rgba.npy b/terracotta/cmaps/data/rdylgn_r_rgba.npy
index 870d1e40..e8aa4688 100644
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diff --git a/terracotta/cmaps/data/spectral_r_rgba.npy b/terracotta/cmaps/data/spectral_r_rgba.npy
index 1ed5c60c..3b860ee2 100644
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diff --git a/terracotta/cmaps/data/turbo_r_rgba.npy b/terracotta/cmaps/data/turbo_r_rgba.npy
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index 00000000..0656937d
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diff --git a/terracotta/cmaps/data/turbo_rgba.npy b/terracotta/cmaps/data/turbo_rgba.npy
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index 00000000..eb6ba329
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