Hi, 

Please try to use t-attf tag inside the record

example:

t-attf-style="background:{{condition?red:blue}};"

in this if the condition satisfies it takes red and else it takes blue

Regards

A workaround to achieve something like this is to add multiple fields and make them visible for the given condition. So something like this:

<field 

   name="my_field" 

   string="My Field" 

   class="class_green" 

   attrs="{'invisible': [('condition', '!=', 'value')]}" 

/>

<field 

   name="my_field" 

   string="My Field" 

   class="class_red" 

   attrs="{'invisible': [('condition', '!=', 'other_value')]}" 

/>

I hope this helps!