MainActivity.kt

Column(
      modifier = Modifier
          .fillMaxSize(),
      horizontalAlignment = Alignment.CenterHorizontally,
      verticalArrangement = Arrangement.Center
  ) {
      val hsv = remember {
          val hsv = floatArrayOf(0f, 0f, 0f)
          AndroidColor.colorToHSV(Color.Blue.toArgb(), hsv)
          mutableStateOf(
              Triple(hsv[0], hsv[1], hsv[2])
          )
      }
      val backgroundColor = remember(hsv.value) {
          mutableStateOf(Color.hsv(hsv.value.first, hsv.value.second, hsv.value.third))
      }
      SatValPanel(hue = hsv.value.first) { sat, value ->
          hsv.value = Triple(hsv.value.first, sat, value)
      }
      Spacer(modifier = Modifier.height(32.dp))
      HueBar { hue ->
          hsv.value = Triple(hue, hsv.value.second, hsv.value.third)
      }
      Spacer(modifier = Modifier.height(32.dp))
      Box(
          modifier = Modifier
              .size(100.dp)
              .background(backgroundColor.value)
      )
  }