#284F99

#284F99

Color Values

HEX

#284F99

RGB

40, 79, 153

HSL

219.3, 58.5%, 37.8%

HSV

219.3, 73.9%, 60.0%

CMYK

73.9%, 48.4%, 0.0%, 40.0%

OKLCH

0.4412 0.1291 261.7

Properties

Cool Dark Nearest: NCS S 2060-B Deep Blue

Color Harmonies

Complementary

#284F99

#997228

Analogous

#288799

#392899

#284F99

Triadic

#284F99

#99284F

#4F9928

Split Complementary

#284F99

#993928

#879928

Tetradic

#284F99

#992887

#997228

#289939

Color Blindness Simulation

Original

#284F99

Protanopia

#393987

Deuteranopia

#373483

Tritanopia

#2A7976

Achromatopsia

#4C4C4C

CSS Usage

background-color: #284F99;
color: #284F99;
border-color: #284F99;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F4F6FB
100
#E4EAF6
200
#C6D5F0
300
#9EB7E6
400
#6990D8
500
#3568CA
600
#2A54A2
700
#224381
800
#1A3465
900
#17294A
950
#0E1A2F

Contrast Checker

Text on white

7.87:1

AA Pass AAA Pass

Text on black

2.67:1

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