Do you mean this circle ?
import turtle
colors = [
"#880000",
"#884400",
"#888800",
"#008800",
"#008888",
"#000088",
"#440088",
"#880088"
]
#--------------------
#turtle.reset()
angle = 360/len(colors)
turtle.width(10)
for color in colors:
turtle.color(color)
turtle.circle(100, angle)
There will be more work with filled circle because you have to draw filled "triangle" (arc) one by one.
EDIT:
import turtle
colors = [
"#880000",
"#884400",
"#888800",
"#008800",
"#008888",
"#000088",
"#440088",
"#880088"
]
#--------------------
def filled_arc(radius, angle, color):
turtle.color(color)
turtle.begin_fill()
turtle.forward(radius)
turtle.left(90)
turtle.circle(radius, angle)
turtle.left(90)
turtle.forward(radius)
turtle.end_fill()
turtle.left(180-angle)
#--------------------
angle = 360/len(colors)
for color in colors:
filled_arc(100, angle, color)
turtle.left(angle)