css - Change button label color Sencha -


how change color of buttonlabel in sencha? appears black, how change code:

xtype: 'button', ui: 'plain', text:'saved searches', centered:true, iconcls: 'search', iconalign:'center', height:'100%',               width:'18%', left:'29.68%', cls: 'x-iconalign-top', labelcls:"font-size: 100%;"

i have tried attributes , found solution. set labelcls custom css class have added app.css file.

here class have added app.css:

.customcls {  color:red; font-size: 100%; }

and in js file set:

labelcls:"customcls"

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