diff --git a/gef.py b/gef.py
index 93407019e..22b9b5e94 100644
--- a/gef.py
+++ b/gef.py
@@ -502,23 +502,30 @@ def wrapper(*args: Any, **kwargs: Any) -> Callable:
 
 class Color:
     """Used to colorify terminal output."""
+
+    ### Special chars:
+    # \001      ->  Tell the readline library that we start a special sequence
+    #               which won't be displayed (takes no column in the output)
+    # \002      ->  Tell the readline library that we end a special sequence
+    #               started with \001
+    # \033      ->  Start an ANSI escape code for displaying colors
     colors = {
-        "normal"         : "\033[0m",
-        "gray"           : "\033[1;38;5;240m",
-        "light_gray"     : "\033[0;37m",
-        "red"            : "\033[31m",
-        "green"          : "\033[32m",
-        "yellow"         : "\033[33m",
-        "blue"           : "\033[34m",
-        "pink"           : "\033[35m",
-        "cyan"           : "\033[36m",
-        "bold"           : "\033[1m",
-        "underline"      : "\033[4m",
-        "underline_off"  : "\033[24m",
-        "highlight"      : "\033[3m",
-        "highlight_off"  : "\033[23m",
-        "blink"          : "\033[5m",
-        "blink_off"      : "\033[25m",
+        "normal"         : "\001\033[0m\002",
+        "gray"           : "\001\033[1;38;5;240m\002",
+        "light_gray"     : "\001\033[0;37m\002",
+        "red"            : "\001\033[31m\002",
+        "green"          : "\001\033[32m\002",
+        "yellow"         : "\001\033[33m\002",
+        "blue"           : "\001\033[34m\002",
+        "pink"           : "\001\033[35m\002",
+        "cyan"           : "\001\033[36m\002",
+        "bold"           : "\001\033[1m\002",
+        "underline"      : "\001\033[4m\002",
+        "underline_off"  : "\001\033[24m\002",
+        "highlight"      : "\001\033[3m\002",
+        "highlight_off"  : "\001\033[23m\002",
+        "blink"          : "\001\033[5m\002",
+        "blink_off"      : "\001\033[25m\002",
     }
 
     @staticmethod
diff --git a/tests/utils.py b/tests/utils.py
index 0254ed080..f88d3b304 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -59,22 +59,22 @@ def which(program: str) -> pathlib.Path:
 class Color(enum.Enum):
     """Used to colorify terminal output."""
 
-    NORMAL = "\x1b[0m"
-    GRAY = "\x1b[1;38;5;240m"
-    LIGHT_GRAY = "\x1b[0;37m"
-    RED = "\x1b[31m"
-    GREEN = "\x1b[32m"
-    YELLOW = "\x1b[33m"
-    BLUE = "\x1b[34m"
-    PINK = "\x1b[35m"
-    CYAN = "\x1b[36m"
-    BOLD = "\x1b[1m"
-    UNDERLINE = "\x1b[4m"
-    UNDERLINE_OFF = "\x1b[24m"
-    HIGHLIGHT = "\x1b[3m"
-    HIGHLIGHT_OFF = "\x1b[23m"
-    BLINK = "\x1b[5m"
-    BLINK_OFF = "\x1b[25m"
+    NORMAL          = "\001\033[0m\002"
+    GRAY            = "\001\033[1;38;5;240m\002"
+    LIGHT_GRAY      = "\001\033[0;37m\002"
+    RED             = "\001\033[31m\002"
+    GREEN           = "\001\033[32m\002"
+    YELLOW          = "\001\033[33m\002"
+    BLUE            = "\001\033[34m\002"
+    PINK            = "\001\033[35m\002"
+    CYAN            = "\001\033[36m\002"
+    BOLD            = "\001\033[1m\002"
+    UNDERLINE       = "\001\033[4m\002"
+    UNDERLINE_OFF   = "\001\033[24m\002"
+    HIGHLIGHT       = "\001\033[3m\002"
+    HIGHLIGHT_OFF   = "\001\033[23m\002"
+    BLINK           = "\001\033[5m\002"
+    BLINK_OFF       = "\001\033[25m\002"
 
 
 def is_64b() -> bool: