I'm curious to see what you're colored letters and numbers look like! Please share! Here's mine:
A: bright red.
B: doesn't really have a color, but it's generally bright blue.
C: orangey yellow.
D: dark green.
E: hot pink/magenta.
F: purple
G: golden orangish-brown.
H: gray.
I: white.
J: dark navy blue, almost black.
K: navy blue.
L: bright lime green.
M: blue.
N: lime green, but more muted than L.
O: bright orange.
P: hot pink/magenta.
Q: golden brown.
R: dark purple.
S: yellow.
T: navy blue.
U: pale gray.
V: green.
W: greenish gray.
X: silver.
Y: navy blue.
Z: blackish silver.
0: very pale gray.
1: red by itself, but white with another number.
2: bright blue.
3: hot pink/magenta.
4: yellow.
5: dark green.
6: dark blue, but not quite navy blue.
7: lime green.
8: orange.
9: navy blue.

Please share! :) Let's get our synesthetic juices flowing!

A: red, but not bright. a bit like it was painted and the colour started to fade. but "a" is often pink.
B: normal blue.
C: neon yellow.
D: dark blue.
E: sky blue.
F: orangish yellow
G: really orange
H: green
I: red
J: brownish/rusty orange
K: light blue
L: soft orange, but metalic
M: cherry red, with a little bright pink.
N: hazy navy blue.
O: (boring) white.
P: pale yellow/tan
Q: white
R: grass green
S: yellow.
T: brick red
U: deep shiny purple (my favourite)
V: green.
W: really light blue
X: black
Y: goldenish yellow
Z: silver, sky blueish
0: white/silver
1: red by itself, but white with another number.
2: sky blue
3: forest green
4: yellow.
5: orange with a bit of violet.
6: dark purple.
7: orange.
8: black.
9: ugly brown.

A- yellow
B- sky blue
C- yellow-green
D- dark green
E- silver
F- red-orangey pink
G- brown
H- tan
I- not much color, either a very light gray or a glassy sort of color.
J- dark green, but not as dark as D
K- salmon pink
L- usually sea green, but just regular green in some contexts
M- bright red
N- dark brown
O- Either no color or a vague smoky gray
P- pink
Q- cool gray
R- deep brownish-red
S- very slightly yellowish green
T- brown
U- orangish gray
V- light brown and dark purple at the same time
W- very light blue
X- weird yellowy brown
Y- yellow but not as bright as A
Z- very dark gray
1- white or brown depending on what's around it
2- sky blue
3- goldenrod yellow
4- blue
5- red
6- pink
7- green, similar to S
8- purple and brown at the same time
9- also purplebrown, but darker

A: orange
B: dark warm brown
C: white
D: baby blue
E: cheesecake yellow
F: dark green
G: grey, sometimes light brown/orange-y
H: lightish-brown
I: pink in lower case, white in upper case.
J: reddish brown, dark blue when preceding an o.
K: hot purplish-pink, sometimes brown.
L: white
M: school bus yellow
N: medium soft blue
O: sometimes white, sometimes black, occasionally blue.
P: brow, sometimes purple.
Q: dark grey with a hint of brown or red.
R: bright red in upper case, maroon in lower case.
S: sharp yellow
T: very dark blue, almost black.
U: different shades of grey dependingon the letters surrounding it.
V: light green
W: light grey but sometimes orange-y brown.
X: really dark greenish-blue.
Y: greyish-white
Z: sandy-yellow
0: greyish-white and thinner than 1.
1: white
2: yellow
3: hot pink-red
4: blue
5: very light sandy-brown
6: dark pink-red
7: almost neon green
8: navy blue
9: dark blood-red

A: yellow, reminds me of very opaque lemonade...and lemons
B: a light orange with a tint of yellow
C: purple, kinda like lavender, but I think darker, and with more of a pinker tint
D: a medium green but on the lighter side of medium (if that makes sense)
E: white with a tint of orange (it always confuses me)
F: orange, kinda light
G: really dark green
H: green, in the middle of G and D
I: either black, or DAAAAARK blue, its hard to tell
J: blue, can't think of a description
K: orange, darker, reminds me of dark oranges
L: yellow, almost like A but darker
M: a mix of L and A
N: red, kinda like a brick?
O: I think black?
P: dark red
Q: a dark blue
R: reddish brown
S: it looks like there are two layers; the bottom one is white, the top one is green
T: dark purple
U: a very light brown, with almost a pink tint
V: darkish green
W: tannish orange
X: tannish red
Y: brownish color
Z: darker green, but not really dark
0: black, but kinda white because the inside of the circle is white
1: black
2: silvery blue
3: lightish purple
4: dark red
5: bright yellow
6: light brown
7: deep yellow
8: daaaaark brown
9: medium green

My letter don't really have colours, but numbers are as follows:

0 -gray
1- white
2- Can be green or blue
3- Blue-ish Sea Green
4- Forest green
5- Sky blue
6- Orange
7- Emerald Green
8- Black
9- Maroonish-red