diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2d7f2d29..affb820c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -27,7 +27,7 @@ repos:
       - id: add-trailing-comma
 
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.0
+    rev: v3.15.1
     hooks:
       - id: pyupgrade
 
@@ -37,12 +37,12 @@ repos:
   #     - id: autopep8
 
   - repo: https://github.com/PyCQA/autoflake
-    rev: v2.2.1
+    rev: v2.3.0
     hooks:
       - id: autoflake
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.1.14
+    rev: v0.2.2
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
diff --git a/pyproject.toml b/pyproject.toml
index 25bf220e..e5c916ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,10 +18,10 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "bumpver==2023.1129",
-    "hypothesis==6.98.1",
-    "pre-commit==3.6.0",
-    "pytest==7.4.4",
-    "pytest-asyncio==0.23.4",
+    "hypothesis==6.98.8",
+    "pre-commit==3.6.2",
+    "pytest==8.0.1",
+    "pytest-asyncio==0.23.5",
     "pytest-cov==4.1.0", # https://github.com/pytest-dev/pytest/issues/11868#issuecomment-1913516238
 ]
 
diff --git a/src/musiclib/svg/isomorphic/base.py b/src/musiclib/svg/isomorphic/base.py
index e452b433..3f481979 100644
--- a/src/musiclib/svg/isomorphic/base.py
+++ b/src/musiclib/svg/isomorphic/base.py
@@ -25,9 +25,9 @@ def __init__(
         *,
         interval_colors: dict[AbstractInterval | int, Color] | None = None,
         interval_strokes: dict[AbstractInterval | int, Color] | None = None,
-        interval_radial_parts_colors: dict[int, dict[int, Color]] | None = None,
-        interval_horizontal_parts_colors: dict[int, dict[int, Color]] | None = None,
-        interval_vertical_parts_colors: dict[int, dict[int, Color]] | None = None,
+        interval_radial_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
+        interval_horizontal_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
+        interval_vertical_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
         n_parts: int | None = None,
         interval_text: TEXT_CALLABLE | None = middle_text_kw_abstract_interval,
         interval_subtext: TEXT_CALLABLE | None = None,
@@ -76,9 +76,9 @@ def __init__(
 
     def validate_parts_colors(
         self,
-        interval_radial_parts_colors: dict[int, dict[int, Color]] | None = None,
-        interval_horizontal_parts_colors: dict[int, dict[int, Color]] | None = None,
-        interval_vertical_parts_colors: dict[int, dict[int, Color]] | None = None,
+        interval_radial_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
+        interval_horizontal_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
+        interval_vertical_parts_colors: dict[AbstractInterval | int, dict[int, Color]] | None = None,
         n_parts: int | None = None,
     ) -> None:
         if not are_mutually_exclusive(
@@ -163,7 +163,7 @@ def add_parts(self, interval: int, x: float, y: float, id_: str) -> None:  # noq
         if self.n_parts is None:
             raise ValueError('n_parts must be provided if any of interval_radial_parts_colors, interval_horizontal_parts_colors, interval_vertical_parts_colors is provided')
         if self.interval_radial_parts_colors is not None:
-            for part, color in self.interval_radial_parts_colors.get(interval, {}).items():
+            for part, color in self.interval_radial_parts_colors.get(interval, self.interval_radial_parts_colors.get(AbstractInterval(interval), {})).items():
                 if part >= self.n_parts:
                     raise ValueError(f'part={part} must be less than n_parts={self.n_parts}')
                 p0 = vertex(x, y, self.radius, self.n_parts, part)
@@ -182,7 +182,7 @@ def add_parts(self, interval: int, x: float, y: float, id_: str) -> None:  # noq
                 )
 
         if self.interval_horizontal_parts_colors is not None:
-            for part, color in self.interval_horizontal_parts_colors.get(interval, {}).items():
+            for part, color in self.interval_horizontal_parts_colors.get(interval, self.interval_horizontal_parts_colors.get(AbstractInterval(interval), {})).items():
                 if part >= self.n_parts:
                     raise ValueError(f'part={part} must be less than n_parts={self.n_parts}')
                 self.elements.append(
@@ -194,7 +194,7 @@ def add_parts(self, interval: int, x: float, y: float, id_: str) -> None:  # noq
                 )
 
         if self.interval_vertical_parts_colors is not None:
-            for part, color in self.interval_vertical_parts_colors.get(interval, {}).items():
+            for part, color in self.interval_vertical_parts_colors.get(interval, self.interval_vertical_parts_colors.get(AbstractInterval(interval), {})).items():
                 if part >= self.n_parts:
                     raise ValueError(f'part={part} must be less than n_parts={self.n_parts}')
                 self.elements.append(