Released in 1986, "True Colors" by Cyndi Lauper became a true 80's classic hit after spending weeks at the top of the charts.
You may have also heard versions by Phil Collins, Kasey Chambers, the Glee cast, Justin Timberlake and Anna Kendrick's cover, per perhaps in the 2016 animated film Trolls.
A slightly trickier one to play, but lovely nevertheless :)
D# D C C .A-G
You with the sad eyes
E F G - G - F
Don't be discouraged
E D D-E-C
Oh I realize
.A D D D D - C
Its hard to take courage
.B .B C C C D-C
In a world full of people
C E F G G A C
You can lose sight of it all
C C D - D D-D C
And the darkness inside you
C C C C C C
Can make you feel so small
C C E G A A-G
But I see your true colors
E - D D - E
Shining through
C E G A A-G
I see your true colors
C A A A A G
And that's why I love you
G A A G - E C D D D-C
So don't be afraid to let them show
C C C - C
Your true colors
C C-D-E .G E-D-D
True colors are beautiful
C C C - .A
Like a rainbow...