Blender 2.9, Python background light color test

It is a test with blender, python, background light color, RGB hexadecimal specification. The cube is illuminated with a background light and three spotlights. Examples of colors are aquamarine # 7fffd4, papayawhip # ffefd5 powderblue # b0e0e6 darkkhaki # bdb76b Impression that the area can be used. Today there is no camera movement and only still images without videos.

Of the three images, the upper one is 0.1 times the background light, the second is 0.9 times, and the third is 0.5 times.

import bpy

# ========= DELETE ALL mesh, light, camera =========
for item in bpy.data.objects:
    bpy.data.objects.remove(item)
# =========

def hex_to_rgb( hex_value ):
    b = (hex_value & 0xFF) / 255.0
    g = ((hex_value >> 8) & 0xFF) / 255.0
    r = ((hex_value >> 16) & 0xFF) / 255.0
    return r, g, b
h = 0xb0e0e6
# aquamarine #7fffd4,  papayawhip #ffefd5  powderblue #b0e0e6 darkkhaki #bdb76b

#bpy.data.worlds["World"].node_tree.nodes["Background"].inputs[0].default_value = (R, G, B, 1)
bpy.data.worlds["World"].node_tree.nodes["Background"].inputs[0].default_value = (*hex_to_rgb(h), 1)
bpy.data.worlds["World"].node_tree.nodes["Background"].inputs[1].default_value = 0.5

for i in range(5):
    for j in range(5):
        for k in range(5):
            bpy.ops.mesh.primitive_cube_add(size=0.5, enter_editmode=False, align='WORLD', location=(i, j, k), scale=(1, 1, 1))
            obj = bpy.context.view_layer.objects.active
            mat = bpy.data.materials.new('Cube')
            r1=0.1+ 0.15*i
            g1=0.1+ 0.15*j
            b1=0.1+ 0.15*k
            mat.diffuse_color = (r1, g1, b1, 0) #====== random BROWN COLOR
            obj.data.materials.append(mat)

# new lamps （ stack overflow Can you add a light source in blender using python)
# =============="light_spot3"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot3", type='SPOT')
light_data.energy = 2000
# create new object with our light datablock
light_object = bpy.data.objects.new(name="light_spot3", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object)
# make it active 
bpy.context.view_layer.objects.active = light_object
#change location
light_object.location = (2, -2, 3)
light_object.delta_rotation_euler = (1.6, 0, 0) #Look straight down at zero zero zero.
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()

# =============="light_spot2"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot2", type='SPOT')
light_data.energy = 2000
# create new object with our light datablock
light_object = bpy.data.objects.new(name="light_spot2", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object)
# make it active 
bpy.context.view_layer.objects.active = light_object
#change location
light_object.location = (2, -4, 8)
light_object.delta_rotation_euler = (1.5, 0, 0) #Look straight down at zero zero zero.
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()
# ============== "light_spot1"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot1", type='SPOT')
light_data.energy = 3000
# create new object with our light datablock
light_object1 = bpy.data.objects.new(name="light_spot1", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object1)
# make it active 
bpy.context.view_layer.objects.active = light_object1
#change location
light_object1.location = (5, -5, 8)
light_object1.delta_rotation_euler = (1.3, 0, 0.3) #Look straight down at zero zero zero.
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()
# ================

bpy.ops.object.camera_add(enter_editmode=False, align='VIEW', location=(6, -6, 11), rotation=(45/180*3.14, -15/180*3.14, 45/180*3.14))