How to modify the color of an "xref" element existing as a cross-reference?

How to modify the color of an "xref" element existing as a cross-reference? It's color now is black, but I want it blue. Excerpts from the EDD file are as follows. Can someone help? Thanks in advance. You can also give me your skype if you have the answer.

Element (CrossReference): xref

Attribute list

Name: show Choice Optional

Choices: new, replace, automatic

Default: automatic

Name: ref-text String Optional

Name: ref-external-id String Optional

Name: ref-file String Optional

Name: ref-id String Optional

Name: window-number Choice Optional

Choices: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Default: 1

Name: condition String Optional

Name: condition-model String Optional

Name: property String Optional

Name: revision Choice Optional

Choices: changed, added, deleted, off

Name: anchor-id String Optional

Name: msg-info String Optional

Initial cross-reference format

If context is: * < (list-steps | block)

Use cross-reference format: number

Else

Use cross-reference format: number-and-text