如何在odoo中添加自定义选择字段颜色

color = fields.Selection([
    ('red', 'Red'),
    ('blue', 'Blue'),
    ('green', 'Green'),
], string='Color')

<record id="view_my_model_form" model="ir.ui.view">
    <field name="name">my.model.form</field>
    <field name="model">my.model</field>
    <field name="arch" type="xml">
        <form>
            <sheet>
                <div>
                    <label for="color"/>Color:
                    <span t-attf-class="o_field_color o_field_widget" t-field="record.color"/>
                </div>
                ...
            </sheet>
        </form>
    </field>
</record>

<record id="view_my_model_inherit" model="ir.ui.view">
    <field name="name">my.model.inherit</field>
    <field name="model">my.model</field>
    <field name="inherit_id" ref="module_name.view_my_model_form"/>
    <field name="arch" type="xml">
        <data>
            ...
            <!-- 添加自定义字段颜色 -->
        </data>
    </field>
</record>

<record id="menu_my_model_form" model="ir.ui.menu">
    <field name="name">My Model</field>
    <field name="action" ref="module_name.view_my_model_inherit"/>
</record>