Is This A Error Red On Blue Paper??

Not sure what you are seeing as an error.
Isn't this U398, carmine on blue paper?

I thought I saw something red on blue paper that was a error it must of been a different one.
Thank you for your help John Becker on the U398. I have a Scott book but I lent it out. I need to get it back.

Paper is NOT BLUE???

For the Washington U388 2 cent carmine blue,2 cent pink, blue: the marking is one short and two long vertical lines at right of "CENTS". The ribbon designs are the same on both sides.
For the re-cut die, U398,2 cent carmine blue, 2 cent pink, blue: the three lines at the right of "CENTS" and at left of "TWO" are usually all short; the lettering heavier and the ends of the ribbons are slightly changed. Right side slightly different side than left .
The ribbon looks the same as left side..looks like a U388.

i thought with the re-cut die, there is a line on the right that lopes and touches the letter "s" and continues up to the direction next to the "n" with space of tthe word,Washington.That also doesn't show in appearance of stamp,which is known for U398

". . . at left of "TWO" are usually all short . . ."

"Usually" is the operative word here. There are around 200 different varieties of the re-cut die, some of which look very much like the original. Some match the description provided by Scott. The UPSS catalog has more detail.

If the OP could give us a big-DPI scan of just the indicium, we could try to come up with the exact die variety.

The paper is definitely mistreated white. Toning, adhesive bleed, soiling, can't tell for sure from the scan. The ragged right side added to the paper condition greatly reduce the value. An examination of the "D" in "UNITED" indicates this is not one of the recuts. Any value to this cover would be from the cancel.

I will take a scan of just the print and I do believe it is blue paper I will scan the back and try to show a better pic from the inside

Look inside and tell us what color you see. Blue paper for this series is definitely and obviously blue. The blue was produced by dyeing the paper and it is remotely possible that it has faded to the appearance in your scan.

In the graphic below the OP's scan is positioned over several envelopes from my accumulation. Right away we have to be cautious, because two scanners are involved. Anyway, . . .

Behind the OP's scan are (top to bottom): dingy white, gray-est end of the blue spectrum (as far as my envelopes go), brightest blue (do), and typical white.

I opened the dingy white because I wanted to demonstrate it wasn't faded, but was surprised at how close it was to the "typical" white. In hand they are more different.