Custom rule loop through resource type

[liyaqatali]

Resources:
CodePipelineDev:
Type: AWS::CloudFormation::Stack
Properties:
TemplateURL: https://cf-templates.s3.us-west-1.amazonaws.com/CF-CodePipeline-Apps-V3.yml
Parameters:
Repository: !Ref Repository
Branch: master
Env: 'dev'
DeploymentGroup: 'Development'
TargetServerBlue: !Ref AppServerDevBlue
TargetServerGreen: !Ref AppServerDevGreen
DockerImage: !Ref DockerImage
CodePipelineStg:
Type: AWS::CloudFormation::Stack
Properties:
TemplateURL: https://cf-templates.s3.us-west-1.amazonaws.com/CF-CodePipeline-Apps-V3.yml
Parameters:
Repository: !Ref Repository
Branch: master
Env: 'stg'
DeploymentGroup: 'Staging'
TargetServerBlue: !Ref AppServerStgBlue
TargetServerGreen: !Ref AppServerStgGreen
DockerImage: !Ref DockerImage

I have a Cloudformation template as above, how to validate TargetServerBlue and TargetServerGreen properties and their values based on environment using custom rules?

Is there any way to validate Parameters values?:
AWSTemplateFormatVersion: 2010-09-09

Parameters:
Repository:
Type: "String"
Default: Admin
AppServerDevBlue:
Description: Target app server. Make sure the value is in uppercase
Type: "String"
Default: AWS001
AppServerDevGreen:
Description: Target app server. Make sure the value is in uppercase
Type: "String"
Default: AWS002
AppServerStgBlue:
Description: Target app server. Make sure the value is in uppercase
Type: "String"
Default: AWS003
AppServerStgGreen:
Description: Target app server. Make sure the value is in uppercase
Type: "String"
Default: AWS004

Thanks