if he is born blind then its difficult to make him reconize 
the colour red.

il keep the blind person face under the sun rays by this 
the color of red he can imagine

same closing eyes

close your eyes and face the sun

he is blind but he can hear so i directly tel him that this 
is red color

we have to show red color apple

i'll let him face the sun.

go to red light and if no vencle is moving then it is red

let the person hold an object which is hot enough to hold or
feel

He is only blind not deaf, so he can hear i can directly 
tel him that this is red color

Blind person can imagine the description what we want to 
tell him/her about the colors description. Basically red 
color indicates love, emotions, distress,danger etc. Red 
color is also used at the time of wars. It also indicates 
the anger of the person.

I will describe like i will pinch him/her then i will tell 
him what you are feeling that is red color.

i will let him to decide by his own because he is the one 
who has to know what red is

my god! i was here n i read all these answers and i am 
laughing out loud...

Give them the RGB #

Red Color indicates danger and love . i will ask him/her to 
eat red rose's leaves.It taste bitter but its fragrance 
gives u a pleasant feeling.........

RED is a bright color. 
Red is "Passion". 
Red is the color of your blood! 
RED the color of the "No" option so please don't click it. ;-)
Is this answer correct? Yes it is!

since he's blind its difficult for him to recognize the 
color,i would just give the symbols and significance of 
each color.red signififies life its bcoz its the color of 
our blood and it also signifies bravery.i'm sure he has 
already eaten an apple,watermelon and other red foods.i 
will intoduce them and let him familiarize each.

i would give him a red hot chilli to eat, and he will 
definately fill the magic of red color.

Since the person is blind..i would stab him with  knife in
his stomuch and make him feel the color red...asking him to
touch the blood..........very simple logic

just tell him its the color of danger!

every blind person can easily able to know the red colour 
becoz the blood which is running in human body is easily 
adaptive by ny blindness.blood resambles relation,it 
indicate love.so there is many thing for a blind even of 
adapting he can feel the red.

ask him to imagine the rising sun and tell him that its the
color "red", he can get it even if he is blind by birth, its
practical its true.

It's not possible.  but a blind person feels objects and 
understands.

I vl say to blind to close eyes and face the sun rays !!