# Format -\> Color regexp for numerical fields?
**URL:** https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142
**Category:** Kibana
**Created:** [May 22, 2019, 6:44am UTC](https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142 "2019-05-22T06:44:41Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Sjaak01](https://discuss.elastic.co/u/Sjaak01)
#### Post date: [May 22, 2019, 6:44am UTC](https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142/1 "2019-05-22T06:44:41Z")
Hello,
What kind of regexp does this color formatter support for numericals? I'm don't have a lot of knowledge regarding regexp but something like [5-9][0-9] or ([5-9][0-9]) works in online regexp checkers but not in Kibana.
Setting static values does not appear to work either (e.g. my index has a value 50.0 and I put 50.0 in the field formatter).
The fields are mapped as numbers (half-float).
I have no problems using various regexp to match string values.
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### Author:  [@lukas](https://discuss.elastic.co/u/lukas)
#### Post date: [May 22, 2019, 7:32pm UTC](https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142/2 "2019-05-22T19:32:51Z")
It's not a regex, it's a simple range. For example, `0:5` would mean "from 0 to 5". No regex is accepted.
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### Author:  [@Sjaak01](https://discuss.elastic.co/u/Sjaak01)
#### Post date: [May 23, 2019, 2:29am UTC](https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142/3 "2019-05-23T02:29:04Z")
Thanks, that works.
I thought it had to be regex as that works on string fields.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 20, 2019, 2:29am UTC](https://discuss.elastic.co/t/format-color-regexp-for-numerical-fields/182142/4 "2019-06-20T02:29:05Z")
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