Fix progess test

packages/core/src/components/CircleProgress.js

@@ -18,7 +18,7 @@ import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import { withStyles } from '@material-ui/core';
 import { Circle } from 'rc-progress';
-import { COLORS } from '../theme/BackstageTheme';
+import { COLORS, V1 } from '../theme/BackstageTheme';
 
 const styles = theme => ({
   root: {
@@ -59,7 +59,7 @@ class CircleProgress extends Component {
 
   static getProgressColor(value, inverse, max /* , classes */) {
     if (isNaN(value)) {
-      return 'grey';
+      return V1.palette.textVerySubtle;
     }
 
     const actualMax = max ? max : CircleProgress.defaultProps.max;

packages/core/src/components/CircleProgress.test.js

@@ -56,6 +56,7 @@ describe('<CircleProgress />', () => {
     expect(CircleProgress.getProgressColor(50)).toBe(COLORS.STATUS.WARNING);
     expect(CircleProgress.getProgressColor(90)).toBe(COLORS.STATUS.OK);
   });
+
   it('colors the inverse progress correct', () => {
     expect(CircleProgress.getProgressColor()).toBe(V1.palette.textVerySubtle);
     expect(CircleProgress.getProgressColor(10, true)).toBe(COLORS.STATUS.OK);