#284FA5#284FA5

#284FA5 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.0% C 0.146 H 263.4°. Best body text is #FFFFFF at 7.63:1 contrast (WCAG AA passes).

Color values

HEX	#284FA5
RGB	rgb(40, 79, 165)
HSL	hsl(221, 61%, 40%)
HSV	hsv(221, 76%, 65%)
CMYK	cmyk(75.8%, 52.1%, 0%, 35.3%)
CIE-LAB	lab(35.52, 17.56, -50.40)
CIE-LCH	lch(35.52, 53.38, 289.21°)
OKLab	oklab(45.02% -0.0169 -0.145)
OKLCH	oklch(45.02% 0.146 263.4)
XYZ	xyz(10.4602, 8.7585, 36.7293)
Luminance	0.0876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FA5 #A57E28

analogous

#288DA5 #284FA5 #3F28A5

triadic

#284FA5 #A5284F #4FA528

tetradic

#284FA5 #A5288D #A57E28 #28A53F

square

#284FA5 #A5288D #A57E28 #28A53F

split-complementary

#284FA5 #A53F28 #8DA528

monochromatic

#102042 #1C3774 #284FA5 #3B69CF #6C8FDB

Accessibility & contrast

On white

7.63

#284FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#284FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FA5

7.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FA5	#FFFFFF	#000000	##FFFFFF
##284FA5	1.00	7.63	2.75	7.63
#FFFFFF	7.63	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#175AA8

Deuteranopia (green-blind)

#004EA3

Tritanopia (blue-blind)

#006472

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284fa5;
/* rgb */ color: rgb(40, 79, 165);
/* oklch */ color: oklch(45.0% 0.146 263.4);

Tailwind

colors: {
  custom: {
    50: '#747fc0',
    500: '#284fa5',
    950: '#000000',
  },
}

SCSS

$custom: #284fa5;
$custom-light: #747fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#284fa5",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 165
  },
  "hsl": {
    "h": 221.28,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4502,
    "c": 0.14601,
    "h": 263.4
  },
  "luminance": 0.0876
}

Semantic roles & 50–950 ramp

primary

#284FA5

secondary

#C2A667

accent

#B244E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284FA5

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →