Test1
{{Storm colour|ND}}

{{Storm colour}}

C0C0C0

{{Storm colour/sandbox}}

C0C0C0

Test2
{{Storm colour|nodata}}

{{Storm colour}}

C0C0C0

{{Storm colour/sandbox}}

C0C0C0

Test3
{{Storm colour|Wind1}}

{{Storm colour}}

C0C0C0

{{Storm colour/sandbox}}

C0C0C0

Test4
{{Storm colour|WS1}}

{{Storm colour}}

C0C0C0

{{Storm colour/sandbox}}

C0C0C0