How do I change the color of arc & text in QwtDial ?

[rawfool]

I'm trying to create a custom dial (CDial) using QwtDial. The purpose of this is to show the analog meter for some attributes. Now that I've created a dial, I want to change the color of the arc drawn around the scale & also the scale itself. Below is the style code and also the snapshot of it.

void CDial::fnSetFeatures()
{
    setReadOnly(true);
    setFrameShadow(QwtDial::Raised);
    setWrapping(false);
 
    setStyleSheet("background: white; color: qradialgradient(cx: 0.3, cy: -0.4, fx: 0.3, fy: -0.4, radius: 1.35, stop: 0 #fff, stop: 1 #888);");
 
    setTracking(true);
    setRange(0, MAG_A_MAX);
    setScaleArc(0, 220);
    setScale(MAG_A_MAX/10, MAG_A_MAX/10, 100);
    setOrigin(150);
    setScaleTicks(0, 4, 8);
    setMass(0.1);
 
    oNeedle = new QwtDialSimpleNeedle(QwtDialSimpleNeedle::Arrow, true, Qt::darkGray,
                                      QColor(Qt::gray).light(130));
    oNeedle->setWidth(10);
    setNeedle(oNeedle);
}

void CDial::fnSetFeatures()
{
    setReadOnly(true);
    setFrameShadow(QwtDial::Raised);
    setWrapping(false);

    setStyleSheet("background: white; color: qradialgradient(cx: 0.3, cy: -0.4, fx: 0.3, fy: -0.4, radius: 1.35, stop: 0 #fff, stop: 1 #888);");
 
    setTracking(true);
    setRange(0, MAG_A_MAX);
    setScaleArc(0, 220);
    setScale(MAG_A_MAX/10, MAG_A_MAX/10, 100);
    setOrigin(150);
    setScaleTicks(0, 4, 8);
    setMass(0.1);

    oNeedle = new QwtDialSimpleNeedle(QwtDialSimpleNeedle::Arrow, true, Qt::darkGray,
                                      QColor(Qt::gray).light(130));
    oNeedle->setWidth(10);
    setNeedle(oNeedle);
}

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CDial.JPG

Please help me code the arc color and text color. Thank you.