HSV color control of the Blinkt! from a Blue Dot.

BlueDotBlinktColorPicker.py

#!/usr/bin/env python

from bluedot import BlueDot
import colorsys
import time
import blinkt

def move(pos):
#    print("The Blue Dot x={} y={} d={} a={}".format(pos.x, pos.y, pos.distance, pos.angle))
    h=((pos.angle+180) % 360) / 360
    s=pos.distance
    v=1.0
    r, g, b = [int(c*255) for c in colorsys.hsv_to_rgb(h, s, v)]
    for x in range(blinkt.NUM_PIXELS):
        blinkt.set_pixel(x, r, g, b)
    blinkt.show()

blinkt.set_brightness(0.1)
blinkt.set_clear_on_exit()

bd = BlueDot()
bd.wait_for_press()
bd.when_pressed = move
bd.when_moved = move

while True:
    time.sleep(1)

New with double click to turn off the Blinkt! LED.

#!/usr/bin/env python

from bluedot import BlueDot
import colorsys
import time
import blinkt

last_time = time.time()

def move(pos):
    h=((pos.angle+180) % 360) / 360
    s=pos.distance
    v=1.0
    r, g, b = [int(c*255) for c in colorsys.hsv_to_rgb(h, s, v)]
    for x in range(blinkt.NUM_PIXELS):
        blinkt.set_pixel(x, r, g, b)
    blinkt.show()

def rmove(pos):
    global last_time
    current_time=time.time()
    delta = current_time-last_time
    last_time = current_time
    print(delta)
    if (delta<0.3) :
        for x in range(blinkt.NUM_PIXELS):
            blinkt.set_pixel(x, 0, 0, 0)
        blinkt.show()

blinkt.set_brightness(0.1)
blinkt.set_clear_on_exit()

bd = BlueDot()
bd.wait_for_press()

bd.when_pressed = move
bd.when_moved = move
bd.when_released = rmove

while True:
    time.sleep(1)

Now updated version and version for other hardware on Github