If it's cloudy, I like green pumpkin or black. If it's sunny, I like green pumpkin with some flake in it like green pumpkin candy or green pumpkin blue. Green pumpkin red is good too. I like to keep it very simple. Flake is nearly pointless without sunshine, that's why I stick with natural solid colors when it's cloudy.

If you cant catch fish on worms, you are likely either going too fast, or you are not setting the hook when they bite.
Both of these can be corrected.
1 worm bites are either on the fall, or while the worm is sitting still. When the worm moves, whether it be a foot or an inch, the bass notice the movement and come to take a look. They will often stare at the bait for a second or 2. If you dont stop the bait, they will more often than not just turn around. In most situations, the longer the pause the better.
2 if you are not setting the hook, you need a better rod to feel the fish, or need practice feeling fish. Rod selection is important. Witha spinning rod, I would set up a shakey head or drop shot. Other wise I would llearn the baitcast. Accurate casts are a must for worm fishing. Throw it right in the middle of a bush or any other cover.
I absolutely love fishing soft plastics and would venture to say color means very little. Buy a pack of senko in any watermelon color, use no weight, fish it so slow it starts to bore you. If you feel a few taps, set the hook with force. If you feel sudden dead weight, set the hook and hold on.

Sounds like you are fishing Joe Pool and Lake Arlington--two lakes that can be very difficult--require lots of time on the water to figure them out. These two lakes do not have the clearest water, especially after the flooding earlier this year. I'd go with worms that displace more water (bigger and maybe a tail that flaps) and darker colors
In the zoom family, instead of a finesse worm, I'd go with a zoom UV speed worm in junebug, black sapphire, or blackberry.

I'm a big fan of worms that are two or three different colors, either with a distinctive swirl or a darker color on top and lighter color on bottom.

For whatever reason, Zoom does a nice job with these color schemes on their flukes and brush hogs; but not their worms (except for the new Z3 swamp crawlers--which are a facsimile of a much better worm made by a different company)
Zoom worms will catch fish just fine, but I don't have confidence in them.

On the tacklewarehouse.com site the Big Bite Baits Sugar Cane paddle tail worms are on sale for $2.49 for a ten pack. I'd pick up a pack of the green pumpkin/blue swirl in 5 inch and a pack in 7 inch. Rig them on a light T rig, split shot, shaky head, or crig and fish them slow.

All the best, you will find a plastic worm you like and how you like to fish it; just takes some trial and error.

watermelon red (clear water)
green pumpkin (light stain to stained)
junebug (stained to heavy stain)
blue fleck (heavy stain to muddy)

I generally like to use these worm colors for a particular color of water. However, usage for worm color to water clarity is not set in stone. Most of these work in various water color types.

Black brown and green only 3 colors you should ever need. More important to focus on presentation retrieve and pattern the fish are on.

Watermelon red brotha and green pumpkin orange. (If you can find it) baby brush hogs.

My pops grew up fishin Joe pool. He said they love red soft plastics.

I have had guides at Fork tell me Berkley Blue Fleck Power Worms day in and day out have caught more fish than any other worm. I like and use Zoom products but hard to beat Blue Fleck Power Worms you might want to give them a try.

Get you some watermelon/red and green pumpkin brush hogs. That's a great bait to start with and they catch fish good luck

Berkeley 7" Power Worm in Black Blue Fleck or motor oil colors. I use a 3/16 oz. tungsten weight. I use a 3/0 Owner Offset Shank Wide Gap Worm Hook with them.

The rig in my sig was moving when I took the pic I guess it's a jack up rig of some sort. I am figuring out these worm things

Some of you recall a little memory trick from HS biology: Roy G. Biv, a made up name that serves as an acrostic to remember the color spectrum of natural light order: red, orange, yellow, green, blue, indigo, and violet.

Starting with red, it has the longest (slowest) wave length . . . all the way in steps down to violet with the shortest. Think rainbows.

The red starts disappearing in water at shallow depths beginning at less than 2 feet. It just becomes gray. Down there at the blue end of the spectrum, those colors hold true deeper.

God only knows how a fish eye works, what it sees. I recall seeing a video of what the world looks like through a cat's eye. Nothing much human about that.

Takeaway: Red, oranges and yellows would be very inconspicuous and just "shades of gray." Greens rather neutral, the blues and darker would hold color the longest (deepest) and thus show the most contrast.

Water, since it is denser than air, takes the longest waves (red) and slows it down so that it loses color the fastest. Scuba divers know this: colors are great to about 40 feet, then it is like color TV going to a black and white.

Just a guess on my part, I haven't research it, but since water continues to "slow down" colors at greater depths, that the colors each revert, through steps, in reverse order as their wavelengths are slowed. So, violet at a certain depth, becomes indigo, then a little deeper becomes blue, then all the way up to red then disappears into shades of grey after a certain depth.

Black and dark colors work well at night, seems almost illogical, because a dark shadow gives the most contrast in dark night water where there is little or no light to reflect.

Summary: clear water lets light penetrate deeper so all colors "hold" deeper; murky waters eliminate light and colors disappear quicker, dark colors are spotted by fish easier.

Brad

I was gonna say the same thing

in zoom i like green pumpkin magic, watermelon magic, watermelon gold, and watermelon candy.

Otherwise, its hard to beat a blue fleck power worm.

Look at Senko's, it has no legs or any moving parts
at all, but it catches fish..!

Is it the color or what?

Go figure!