diff --git a/gallery/test.json b/gallery/test.json
index fc15e6d..f247bea 100644
--- a/gallery/test.json
+++ b/gallery/test.json
@@ -101,5 +101,11 @@
                 }
             }
         }
+    },
+    "colors": {
+        "main": {
+            "31-28": "#FF0000",
+            "11-4": [34, 176, 43]
+        }
     }
 }
diff --git a/gallery/test.pdf b/gallery/test.pdf
index 925be2c..d08058f 100644
Binary files a/gallery/test.pdf and b/gallery/test.pdf differ
diff --git a/gallery/test.xml b/gallery/test.xml
index ab92e22..4a8b716 100644
--- a/gallery/test.xml
+++ b/gallery/test.xml
@@ -65,4 +65,7 @@
             <description>offset register</description>
         </range>
     </structure>
+    <color structure="main" color="#FF0000" start="28" end="31" />
+    <color structure="main" color="#255961" start="4" end="11" />
+    <color structure="immediateOffset" color="89,97,37" start="4" end="11" />
 </schema>
\ No newline at end of file
diff --git a/gallery/test.yaml b/gallery/test.yaml
index 2ca7964..f7119ae 100644
--- a/gallery/test.yaml
+++ b/gallery/test.yaml
@@ -71,3 +71,11 @@ structures:
       3-0:
         name: Rm
         description: offset register
+
+colors:
+  main:
+    31-28: "#3EFA6B"
+    25-23:
+      - 100
+      - 150
+      - 200
\ No newline at end of file
diff --git a/src/schema.typ b/src/schema.typ
index 0602329..5c1f650 100644
--- a/src/schema.typ
+++ b/src/schema.typ
@@ -50,6 +50,28 @@
     parse-raw(path-or-schema)
   }
 
+  if "colors" in schema {
+    for struct in schema.colors.keys() {
+      for (span, col) in schema.colors.at(struct) {
+        if type(col) == str {
+          if col.starts-with("#") {
+            col = rgb(col)
+          } else {
+            let (r, g, b) = col.split(",").map(v => int(v))
+            col = rgb(r, g, b)
+          }
+        } else if type(col) == array {
+          col = rgb(..col)
+        } else if type(col) != color {
+          panic("Invalid color format")
+        }
+        schema.colors.at(struct).at(span) = col
+      }
+    }
+  } else {
+    schema.insert("colors", (:))
+  }
+
   let structures = (:)
   for (id, data) in schema.structures {
     id = str(id)
diff --git a/src/xml-loader.typ b/src/xml-loader.typ
index 1f00c42..9513766 100644
--- a/src/xml-loader.typ
+++ b/src/xml-loader.typ
@@ -83,8 +83,10 @@
 
 #let parse(content) = {
   let struct-elmts = content.children.filter(e => "tag" in e and e.tag == "structure")
+  let color-elmts = content.children.filter(e => "tag" in e and e.tag == "color")
 
   let structures = (:)
+  let colors = (:)
 
   for struct-elmt in struct-elmts {
     structures.insert(
@@ -93,8 +95,19 @@
     )
   }
 
+  for color-elmt in color-elmts {
+    let struct = color-elmt.attrs.structure
+    if not struct in colors {
+      colors.insert(struct, (:))
+    }
+
+    let span = color-elmt.attrs.end + "-" + color-elmt.attrs.start
+    colors.at(struct).insert(span, color-elmt.attrs.color)
+  }
+
   return (
-    structures: structures
+    structures: structures,
+    colors: colors
   )
 }