[Bug] HighchartsGantt class

[MaxPrimeAERY]

Hello.
I have a bug with progress indicator when I use HighchartsGantt class.
The problem is that it's not darker in 25%
Final chart json: { "title": "Tesy", "subtitle": "aaa", "xAxisMinDate": "2023-12-31T22:00:00.000Z", "xAxisMaxDate": "2024-01-30T22:00:00.000Z", "series": [ { "name": "bbbb", "id": "bbbb", "parent": [], "dependency": [], "startDate": "2023-12-31T22:00:00.000Z", "endDate": "2024-01-03T22:00:00.000Z", "completed": 0.25, "milestone": false }, { "name": "iiii", "id": "iiii", "parent": [], "dependency": "bbbb", "startDate": "2024-01-22T22:00:00.000Z", "endDate": "2024-01-23T22:00:00.000Z", "completed": null, "milestone": true }, { "name": "ccc", "id": "ccc", "parent": [], "dependency": [], "startDate": "2024-01-15T22:00:00.000Z", "endDate": "2024-01-16T22:00:00.000Z", "completed": null, "milestone": false } ] }

What it's suppose to be

[MaxPrimeAERY]

I suppose that I am missing some styles. I added @import 'https://code.highcharts.com/css/highcharts.css'; to my styles files but it doesn't help.