Mysql JSON, Find and replace value

I have a table that contains product price and stock by size and color. I put them in JSON format. Table structure like

id | chart
---+--------------------------------------------------------------+
1  | [{"size":"XL", "color":"Red", "stock":"30", "price":"300"},  |
   |  {"size":"XXL", "color":"Red", "stock":"40", "price":"400"}, |
   |  {"size":"XXL", "color":"Blue", "stock":"35", "price":"450"}]|
-------------------------------------------------------------------

I want to update the price value to 350, If the size match with XL and the Color with Red. I tried this code,

UPDATE t
SET chart = REGEXP_REPLACE(
  JSON_EXTRACT(chart, '$'), 
  JSON_OBJECT("size", "XL", "color", "Red", "stock", "([0-9]+)", "price", "([0-9]+)"),
  JSON_OBJECT("size", "XL", "color", "Red", "stock", "$1", "price", "350")
)
WHERE id = 1;

It executes successfully. But the main problem is stock value changes with $1 string. Here it should be updated with previous stock value which is unknown to me.