#1666DF

#1666DF

Color Values

HEX

#1666DF

RGB

22, 102, 223

HSL

216.1, 82.0%, 48.0%

HSV

216.1, 90.1%, 87.5%

CMYK

90.1%, 54.3%, 0.0%, 12.5%

OKLCH

0.5392 0.199 259.7

Properties

Cool Dark Nearest: royalblue

Color Harmonies

Complementary

#1666DF

#DF8F16

Analogous

#16CADF

#2A16DF

#1666DF

Triadic

#1666DF

#DF1666

#66DF16

Split Complementary

#1666DF

#DF2A16

#CADF16

Tetradic

#1666DF

#DF16CA

#DF8F16

#16DF2A

Color Blindness Simulation

Original

#1666DF

Protanopia

#3939C2

Deuteranopia

#342EBB

Tritanopia

#1AABA6

Achromatopsia

#5E5E5E

CSS Usage

background-color: #1666DF;
color: #1666DF;
border-color: #1666DF;
Nearest Tailwind: Blue 600 #2563EB

Tailwind Shades

50
#F2F6FD
100
#E1EBFA
200
#BED5F9
300
#90B8F4
400
#5391EE
500
#176AE8
600
#1255BA
700
#0F4495
800
#0B3574
900
#0D2954
950
#081A35

Contrast Checker

Text on white

5.25:1

AA Pass AAA Fail

Text on black

4.0:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026