how to stop the style i add in replaceText?

[chenjiashrimp]

`(text: string, anchorOffset: number, focusOffset: number) => {
    const contentState = editorState.getCurrentContent()
    const selection = editorState.getSelection()
    const newSelection = selection.merge({
        anchorOffset: anchorOffset,
        focusOffset: focusOffset
    })
 
    let nextEditorState = EditorState.createEmpty()
    let nextContentState
   
    nextContentState = Modifier.replaceText(contentState, newSelection, text, OrderedSet.of('Blue'))
    nextEditorState = EditorState.push(editorState, nextContentState, 'insert-characters')

    setEditorState(nextEditorState);`

i want to use replaceText to replace partial text with blue font(i define a style called 'Blue').I only want blue text from 'anchorOffset' to 'focusOffset', But when i continue to enter the text, the text is always blue, not black. I do not know how to stop 'Blue' style.