#FF0000 — Red
Pure red, the loudest primary on screen.
Use it for errors, sale tags and anything that must be seen first.
Pair with white or near-black; it fights with orange and pink.
Values
Hex#FF0000
RGBrgb(255, 0, 0)
HSLhsl(0, 100%, 50%)
CMYK0%, 100%, 100%, 0%
Contrast vs white4.00:1
Contrast vs black5.25:1
Complementary & analogous
Shade & tint ramp
#1A0000
#4C0000
#800000
#B20000
#E60000
#FF1A1A
#FF4D4D
#FF8080
#FFB2B2
#FFE5E5
CSS
color: #ff0000;
background-color: #ff0000;
--olpes-ff0000: #ff0000;
color: rgb(255 0 0);
color: hsl(0deg 100% 50%);