diff --git a/cluestar/__init__.py b/cluestar/__init__.py
index 7ecd1da..89d44cf 100644
--- a/cluestar/__init__.py
+++ b/cluestar/__init__.py
@@ -99,23 +99,28 @@ def plot_text(X, texts, color_array=None, color_words=None, disable_warning=True
 
     return (p1 | p2).configure_axis(grid=False).configure_view(strokeWidth=0)
 
-
-def _single_scatter_chart(df_, idx, brush, title="embedding space"):
+def _single_scatter_chart(df_, idx, brush, title="embedding space", color_words=None, color_array=None):
     cols = ("x1:Q", "y1:Q") if idx == 1 else ("x2:Q", "y2:Q")
+    if color_words:
+        color=alt.Color("color", sort=["none"] + color_words)
+    elif color_array:
+        color=alt.Color("color")
+    else:
+        color=alt.condition(brush, 'id:O', alt.value('lightgray'), legend=None)
     return (
         alt.Chart(df_)
         .mark_circle(opacity=0.6, size=20)
         .encode(
             x=alt.X(cols[0], axis=None, scale=alt.Scale(zero=False)),
             y=alt.Y(cols[1], axis=None, scale=alt.Scale(zero=False)),
-            color=alt.condition(brush, 'id:O', alt.value('lightgray'), legend=None),
             tooltip=["text"],
+            color=color,
         )
         .properties(width=350, height=350, title=title)
         .add_params(brush)
     )
 
-def plot_text_comparison(X1, X2, texts, disable_warning=True):
+def plot_text_comparison(X1, X2, texts, disable_warning=True, color_array=None, color_words=None):
     """
     Make a visualisation to help find clues in text data.
 
@@ -124,6 +129,8 @@ def plot_text_comparison(X1, X2, texts, disable_warning=True):
         - `X2`: the numeric features, should be a 2D numpy array
         - `texts`: list of text data
         - `disable_warning`: disable the standard altair max rows warning
+        - `color_words`: list of words to highlight
+        - `color_array`: an array that represents color for the plot
     """
     if disable_warning:
         alt.data_transformers.disable_max_rows()
@@ -136,10 +143,24 @@ def plot_text_comparison(X1, X2, texts, disable_warning=True):
     df_ = pd.DataFrame({"x1": X1[:, 0], "y1": X1[:, 1], "x2": X2[:, 0], "y2": X2[:, 1], "text": texts}).assign(
         trunc_text=lambda d: d["text"].str[:120], r=0
     )
+    
+    if color_array is not None:
+        if len(color_array) != X1.shape[0]:
+            raise ValueError(
+                f"The number of color array ({len(color_array)}) should match X array ({X.shape[0]})."
+            )
+        df_ = df_.assign(color=color_array)
+
+    if color_words is not None:
+        df_ = df_.assign(color="none")
+
+        for w in color_words:
+            predicate = df_["text"].str.lower().str.contains(w)
+            df_ = df_.assign(color=lambda d: np.where(predicate, w, d["color"]))
 
     brush = alt.selection_interval()
-    p1 = _single_scatter_chart(df_, 1, brush, title="embedding space X1")
-    p2 = _single_scatter_chart(df_, 2, brush, title="embedding space X2")
+    p1 = _single_scatter_chart(df_, 1, brush, title="embedding space X1", color_words=color_words, color_array=color_array)
+    p2 = _single_scatter_chart(df_, 2, brush, title="embedding space X2", color_words=color_words, color_array=color_array)
 
     p3 = (
         alt.Chart(df_)
@@ -156,4 +177,4 @@ def plot_text_comparison(X1, X2, texts, disable_warning=True):
         .properties(title="text")
     )
 
-    return (p1 | p2 | p3).configure_axis(grid=False).configure_view(strokeWidth=0)
+    return (p1 | p2 | p3).configure_axis(grid=False).configure_view(strokeWidth=0)
\ No newline at end of file