Pick a letter, pick a colour and you have a Prefix.

A
Black-  Ash
White- Ashen
Brown- Acorn
Purple- Alder
Yellow- Ant
Pink- Adder
Green- Aspen
Blue- Aqua
Orange- Amber
Red- Apple
B
Black- Black
White- Briar
Brown- Brown
Purple- Bat
Yellow- Bright
Pink- Bramble
Green- Beetle
Blue- Blue
Orange- Blaze
Red- Boulder
C
Black- Cedar
White- Cloud
Brown- Cinder
Purple- Copper
Yellow- Crooked
Pink- Crow
Green- Clover
Blue- Condor
Orange- Chestnut
Red- Cherry
D
Black- Dark
White- Dove
Brown- Dust
Purple- Day
Yellow- Doe
Pink- Daisy
Green- Deer
Blue- Dusk
Orange- Drift
Red- Dawn
E
Black- Echo
White- Eagle
Brown- Elk
Purple- Eclipse
Yellow- Evergreen
Pink- Ebony
Green- Elm
Blue- Eel
Orange- Evening
Red- Ember
F
Black- Flint
White- Feather
Brown- Fleet
Purple- Fox
Yellow- Fish
Pink- Fern
Green- Frog
Blue- Fly
Orange- Fire
Red- Flame
G
Black- Gray
White- Goose
Brown- Gem
Purple- Galaxy
Yellow- Gold
Pink- Gorse
Green- Grass
Blue- Gecko
Orange- Golden
Red- Ginger
H
Black- Heavy
White- Hare
Brown- Hawk
Purple- Hazel
Yellow- Honey
Pink- Holly
Green- Heather
Blue- Hail
Orange- Hay
Red- Heron
I
Black- Sedge
White- Chill
Brown- Ivy
Purple- Lavender
Yellow- Milk
Pink- Slate
Green- Ivory
Blue- Ice
Orange- Loud
Red- Pepper
J
Black- Jaguar
White- Dapple
Brown- Jagged
Purple- Jump
Yellow- Fallen
Pink- Jackal
Green- Juniper
Blue- Jay
Orange- Bark
Red- Shrew
K
Black- Kink
White- Flash
Brown- Kestrel
Purple- Birch
Yellow- Dancing
Pink- Diamond
Green- Thorn
Blue- Bird
Orange- Endless
Red- Battle
L
Black- Lost
White- Long
Brown- Leopard
Purple- Lily
Yellow- Lightning
Pink- Lark
Green- Leaf
Blue- Lake
Orange- Little
Red- Lion
M
Black- Marsh
White- Morning
Brown- Mole
Purple- Meadow
Yellow- Minnow
Pink- Mud
Green- Moss
Blue- Mint
Orange- Moth
Red- Misty
N
Black- Night
White- Newt
Brown- Scar
Purple- Crystal
Yellow- Tiny
Pink- Narrow
Green- Nettle
Blue- Frost
Orange- Spot
Red- Breeze
O
Black- Ocelot
White- One
Brown- Owl
Purple- Oat
Yellow- Ocean
Pink- Olive
Green- Oak
Blue- Otter
Orange- Orange
Red-  Dew
P
Black- Prickle
White- Pool
Brown- Pounce
Purple- Patch
Yellow- Pear
Pink- Petal
Green- Pine
Blue- Pebble
Orange- Pike
Red- Poppy
Q
Black- Quick
White- Snow
Brown- Quail
Purple- Fennel
Yellow- Dead
Pink- Fallen
Green- Shade
Blue- Wet
Orange- Hollow
Red- Sun
R
Black- Raven
White- Rabbit
Brown- Robin
Purple- Rowan
Yellow- Reed
Pink- Rain
Green- Rose
Blue- River
Orange- Running
Red- Red
S
Black- Shadow
White- Spotted
Brown- Song
Purple- Smoke
Yellow- Sand
Pink- Soft
Green- Sage
Blue- Splash
Orange- Sparrow
Red- Squirrel
T
Black- Tawny
White- Toad
Brown- Timber
Purple- Tall
Yellow- Tiger
Pink- Tumble
Green- Thistle
Blue- Trout
Orange- Talon
Red- Thunder
U
Black- Under
White- Up
Brown- Twig
Purple- Berry
Yellow- Paisley
Pink- Twist
Green- Wind
Blue- Splash
Orange- Bracken
Red- Fawn
V
Black- Vole
White- Arctic
Brown- Vixen
Purple- Beech
Yellow- Mellow
Pink- Humble
Green- Vine
Blue- Gull
Orange- Livid
Red- Moose
W
Black- Weasel
White- White
Brown- Willow
Purple- Wolf
Yellow- Wasp
Pink- Web
Green- Woolly
Blue- Water
Orange- Whisper
Red- Wild
X
Black- Sleep
White- Prey
Brown- Agile
Purple- Prime
Yellow- Rush
Pink- Hunter
Green- Swallow
Blue- Smooth
Orange- Smart
Red- Bear
Y
Black- Grim
White- Naughty
Brown- Snake
Purple- Falcon
Yellow- Yellow
Pink- Leaping
Green- Yarrow
Blue- Odd
Orange- Skunk
Red- Silver
Z
Black- Swift
White- Zebra
Brown- Proud
Purple- Plum
Yellow- Rubble
Pink- Copper
Green- Missing
Blue- Pale
Orange- Fish