What's the helper name for foreground color?
onChangeComplete returns the following.
```
hex: "#9575cd"
hsl: {h: 261.8181818181818, s: 0.4680851063829788, l: 0.6313725490196078, a: 1}
hsv: {h: 261.8181818181818, s: 0.4292682926829269, v: 0.803921568627451, a: 1}
oldHue: 206.57142857142858
rgb: {r: 149, g: 117, b: 205, a: 1}
source: "hex"
```

I see the tick color changes to either black/white depending on the color chosen. May I know what's the helper to get that text color?