diff --git a/nerfstudio/utils/colormaps.py b/nerfstudio/utils/colormaps.py
index 0e09c0bfd..d772d40b4 100644
--- a/nerfstudio/utils/colormaps.py
+++ b/nerfstudio/utils/colormaps.py
@@ -24,7 +24,7 @@ from torch import Tensor
 
 from nerfstudio.utils import colors
 
-Colormaps = Literal["default", "turbo", "viridis", "magma", "inferno", "cividis", "pca"]
+Colormaps = Literal["default", "turbo", "viridis", "magma", "inferno", "cividis", "gray", "pca"]
 
 
 @dataclass(frozen=True)
@@ -104,6 +104,8 @@ def apply_float_colormap(image: Float[Tensor, "*bs 1"], colormap: Colormaps = "v
         colormap = "turbo"
 
     image = torch.nan_to_num(image, 0)
+    if colormap == "gray":
+        return image.repeat(1, 1, 3)
     image_long = (image * 255).long()
     image_long_min = torch.min(image_long)
     image_long_max = torch.max(image_long)
diff --git a/nerfstudio/viewer/server/control_panel.py b/nerfstudio/viewer/server/control_panel.py
index 456e3598c..7039b61c3 100644
--- a/nerfstudio/viewer/server/control_panel.py
+++ b/nerfstudio/viewer/server/control_panel.py
@@ -361,7 +361,7 @@ def _get_colormap_options(dimensions: int, dtype: type) -> List[Colormaps]:
     if dimensions == 3:
         colormap_options = ["default"]
     if dimensions == 1 and dtype == torch.float:
-        colormap_options = [c for c in list(get_args(Colormaps)) if c != "default"]
+        colormap_options = [c for c in list(get_args(Colormaps)) if c not in ("default", "pca")]
     if dimensions > 3:
         colormap_options = ["pca"]
     return colormap_options