diff --git a/src/main/java/de/zonlykroks/advancedscripts/lexer/ExpressionColorizer.java b/src/main/java/de/zonlykroks/advancedscripts/lexer/ExpressionColorizer.java
new file mode 100644
index 0000000..a0e691a
--- /dev/null
+++ b/src/main/java/de/zonlykroks/advancedscripts/lexer/ExpressionColorizer.java
@@ -0,0 +1,134 @@
+package de.zonlykroks.advancedscripts.lexer;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class ExpressionColorizer {
+
+    private ExpressionColorizer() {
+        throw new IllegalStateException("Utility class");
+    }
+
+    public static List<Token> colorize(String expression) {
+        List<String> parts = tokenize(expression);
+        List<Token> tokens = new ArrayList<>();
+        for (int i = 0; i < parts.size(); i++) {
+            String part = parts.get(i);
+            if ("{".equals(part) || "}".equals(part)) {
+                tokens.add(new Token(part, TokenTypeColors.OTHER));
+                continue;
+            }
+            if ("true".equalsIgnoreCase(part) || "false".equalsIgnoreCase(part)) {
+                tokens.add(new Token(part, TokenTypeColors.BOOLEAN));
+                continue;
+            }
+            try {
+                Double.parseDouble(part);
+                tokens.add(new Token(part, TokenTypeColors.NUMBER));
+                continue;
+            } catch (NumberFormatException ignored) {
+            }
+            try {
+                Long.parseLong(part);
+                tokens.add(new Token(part, TokenTypeColors.NUMBER));
+                continue;
+            } catch (NumberFormatException ignored) {
+            }
+            if (part.contains(".")) {
+                String[] split = part.split("\\.");
+                if (split.length == 1) {
+                    tokens.add(new Token(part, TokenTypeColors.VARIABLE));
+                    continue;
+                }
+                if (VariablePrefixes.RPEFIXES.contains(split[0])) {
+                    tokens.add(new Token(split[0], TokenTypeColors.OTHER));
+                    tokens.add(new Token(".", TokenTypeColors.OTHER));
+                    split = Arrays.copyOfRange(split, 1, split.length);
+                }
+                tokens.add(new Token(split[0], TokenTypeColors.VARIABLE));
+                for (int j = 1; j < split.length; j++) {
+                    String s = split[j];
+                    tokens.add(new Token(".", TokenTypeColors.OTHER));
+                    if (VariableSuffixes.SUFFIXES.contains(s)) {
+                        tokens.add(new Token(s, TokenTypeColors.OTHER));
+                    } else {
+                        tokens.add(new Token(s, TokenTypeColors.ERROR));
+                    }
+                }
+                continue;
+            }
+            if (Operators.OPERATORS.contains(part)) {
+                String previous = get(parts, i, -1);
+                String next = get(parts, i, 1);
+                if (previous == null || next == null) {
+                    tokens.add(new Token(part, TokenTypeColors.ERROR));
+                    continue;
+                }
+                if (Operators.OPERATORS.contains(previous) || Operators.OPERATORS.contains(next)) {
+                    tokens.add(new Token(part, TokenTypeColors.ERROR));
+                    continue;
+                }
+                if ("{".equals(previous) || "}".equals(next)) {
+                    tokens.add(new Token(part, TokenTypeColors.ERROR));
+                    continue;
+                }
+                tokens.add(new Token(part, TokenTypeColors.OTHER));
+                continue;
+            }
+            if (part.matches("[+\\-*/%^&|<>=!]+")) {
+                tokens.add(new Token(part, TokenTypeColors.ERROR));
+                continue;
+            }
+            tokens.add(new Token(part, TokenTypeColors.VARIABLE));
+        }
+        return tokens;
+    }
+
+    private static String get(List<String> parts, int index, int direction) {
+        for (int i = index + direction; i >= 0 && i < parts.size(); i += direction) {
+            String part = parts.get(i);
+            if (!part.isEmpty()) return part;
+        }
+        return null;
+    }
+
+    private static List<String> tokenize(String s) {
+        List<String> tokens = new ArrayList<>();
+        StringBuilder token = new StringBuilder();
+        for (int i = 0; i < s.length(); i++) {
+            char c = s.charAt(i);
+            if (c == '{' || c == '}' || c == ' ') {
+                if (token.length() > 0) {
+                    tokens.add(token.toString());
+                    token = new StringBuilder();
+                }
+                tokens.add(c + "");
+                continue;
+            }
+            StringBuilder op = new StringBuilder();
+            for (int j = i; j < s.length(); j++) {
+                char k = s.charAt(j);
+                if (k == '+' || k == '-' || k == '*' || k == '/' || k == '%' || k == '^' || k == '&' || k == '|' || k == '>' || k == '<' || k == '=' || k == '!') {
+                    op.append(k);
+                } else {
+                    break;
+                }
+            }
+            if (op.length() > 0) {
+                if (token.length() > 0) {
+                    tokens.add(token.toString());
+                    token = new StringBuilder();
+                }
+                tokens.add(op.toString());
+                i += op.length() - 1;
+                continue;
+            }
+            token.append(c);
+        }
+        if (token.length() > 0) {
+            tokens.add(token.toString());
+        }
+        return tokens;
+    }
+}
diff --git a/src/main/java/de/zonlykroks/advancedscripts/lexer/ScriptColorizer.java b/src/main/java/de/zonlykroks/advancedscripts/lexer/ScriptColorizer.java
index e90fc9e..54322be 100644
--- a/src/main/java/de/zonlykroks/advancedscripts/lexer/ScriptColorizer.java
+++ b/src/main/java/de/zonlykroks/advancedscripts/lexer/ScriptColorizer.java
@@ -165,8 +165,7 @@ public class ScriptColorizer {
             index++;
         } while (depth != 0 && index <= current.length());
         if (depth != 0) return List.of(new Token(current, TokenTypeColors.ERROR));
-        String expression = current.substring(0, index); // TODO: colorize expression
-        return List.of(new Token(expression, TokenTypeColors.OTHER));
+        return ExpressionColorizer.colorize(current.substring(0, index));
     }
 
     private static List<Token> parseJumpPoint(String current) {