Color fatal error:set '#000' but got '#484848' or some other color?Who change my color?||颜色渲染错误，黑色变灰色

[czzonet]

Version

4.9.0

Steps to reproduce

Examples - Apache ECharts (incubating)

set : areaStyle: { color:'#000'}

option = {
    xAxis: {
        type: 'category',
        boundaryGap: false,
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        areaStyle: {   color:'#000'}
    }]
};

What is expected?

color:'#000'

What is actually happening?

color:'#484848'

---

What am I missing?

[echarts-bot]

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[pissang]

It's because it's semi-transparent.

Set areaStyle.opacity to 1

[czzonet]

Cool. It works. Is it mentioned anywhere in the document?