#284A9D#284A9D

#284A9D is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.3% C 0.141 H 264.5°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#284A9D
RGB	rgb(40, 74, 157)
HSL	hsl(223, 59%, 39%)
HSV	hsv(223, 75%, 62%)
CMYK	cmyk(74.5%, 52.9%, 0%, 38.4%)
CIE-LAB	lab(33.52, 17.82, -48.82)
CIE-LCH	lch(33.52, 51.97, 290.05°)
OKLab	oklab(43.32% -0.0136 -0.1404)
OKLCH	oklch(43.32% 0.141 264.5)
XYZ	xyz(9.4075, 7.7820, 32.8980)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284A9D #9D7B28

analogous

#28849D #284A9D #40289D

triadic

#284A9D #9D284A #4A9D28

tetradic

#284A9D #9D2884 #9D7B28 #289D40

square

#284A9D #9D2884 #9D7B28 #289D40

split-complementary

#284A9D #9D4028 #849D28

monochromatic

#0F1C3B #1C336C #284A9D #3662CC #6788D8

Accessibility & contrast

On white

8.21

#284A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#284A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284A9D

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284A9D	#FFFFFF	#000000	##FFFFFF
##284A9D	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1254A0

Deuteranopia (green-blind)

#004A9B

Tritanopia (blue-blind)

#005E6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284a9d;
/* rgb */ color: rgb(40, 74, 157);
/* oklch */ color: oklch(43.3% 0.141 264.5);

Tailwind

colors: {
  custom: {
    50: '#737cba',
    500: '#284a9d',
    950: '#000000',
  },
}

SCSS

$custom: #284a9d;
$custom-light: #737cba;
$custom-dark: #000000;

JSON

{
  "hex": "#284a9d",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 157
  },
  "hsl": {
    "h": 222.564,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.43324,
    "c": 0.14111,
    "h": 264.5
  },
  "luminance": 0.07783
}

Semantic roles & 50–950 ramp

primary

#284A9D

secondary

#BEA462

accent

#B545E3

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284A9D

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

Preview Lab → · Contrast checker → · Palette generator →