Randomly distributed circles inside an annulus

With the following code:

findPoints =
Compile[{{n, _Integer}, {low, _Real}, {high, _Real}, {minD, _Real}},
Block[{data = RandomReal[{low, high}, {1, 2}], k = 1, rv, temp},
While[k < n, rv = RandomReal[{low, high}, 2];
temp = Transpose[Transpose[data] - rv];
If[Min[Sqrt[(#.#)] & /@ temp] > minD, data = Join[data, {rv}];
k++;];];
data]];

npts = 150;
r = 0.03;
minD = 2.2 r;
low = 0;
high = 1;

SeedRandom
pts = findPoints[npts, low, high, minD];
g2d = Graphics[{FaceForm@Lighter[Blue, 0.4],
EdgeForm@Directive[Thickness[0.004], Black], Disk[#, r] & /@ pts},
PlotRange -> All, Background -> Lighter@Blue];

d1 = Disk[{0.5, 0.5}, 0.5];
d2 = Disk[{0.5, 0.5}, 0.3];
annulus = RegionDifference[d1, d2];

mask2 = BoundaryDiscretizeRegion[#, {{-1, 1}, {-1, 1}},
MaxCellMeasure -> {1 -> .02}] &@BoundaryDiscretizeRegion[annulus];
r2d2 = DiscretizeGraphics[g2d, MaxCellMeasure -> {1 -> .01},
PlotRange -> All];
inside2 = RegionIntersection[r2d2, mask2]

I can produce (pseudo)randomly distributed circles inside an annulus. I have two questions. The first is a ridiculous one: How can we modify the color (e.g. Red) of the DiscretizeGraphics output.

The second one is not a tricky one. I want the circles to have random radius. Any ideas of how can I achieve that?

For References about above codes see the question:

find the maximum number of not intersecting circles inside an ellipse

and references therein.

Far from efficient, but we can adapt the Neat Example from the RegionDisjoint ref page. Note that a non-uniform distribution of radii would probably speed things up.

outerReg = Annulus[];

randomBall[dim_, reg_] := (
While[
!RegionWithin[reg, ball = Ball[RandomPoint[reg], RandomReal[{1/15, 1/6}]]],
(* spin *)
];
ball
)

appendDisjointBall[dim_][reg : Ball[pts_, rs_]] :=
Block[{ball = randomBall[dim, outerReg]},
While[! RegionDisjoint[ball, reg],
ball = randomBall[dim, outerReg]
];
Ball[Append[pts, #1], Append[rs, #2]] & @@ ball
]

disjointBalls[n_, dim_] :=
Nest[appendDisjointBall[dim], List /@ randomBall[dim, outerReg], n - 1]

n = 40;
scene2D = disjointBalls[n, 2];

Graphics[{
{EdgeForm[Black], GrayLevel[.9], Annulus[]}, 