#284DA8#284DA8

#284DA8 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.8% C 0.153 H 264.4°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#284DA8
RGB	rgb(40, 77, 168)
HSL	hsl(223, 62%, 41%)
HSV	hsv(223, 76%, 66%)
CMYK	cmyk(76.2%, 54.2%, 0%, 34.1%)
CIE-LAB	lab(35.17, 20.06, -52.75)
CIE-LCH	lch(35.17, 56.44, 290.82°)
OKLab	oklab(44.83% -0.015 -0.152)
OKLCH	oklch(44.83% 0.153 264.4)
XYZ	xyz(10.5943, 8.5848, 38.1369)
Luminance	0.0859 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DA8 #A88328

analogous

#288DA8 #284DA8 #4328A8

triadic

#284DA8 #A8284D #4DA828

tetradic

#284DA8 #A8288D #A88328 #28A843

square

#284DA8 #A8288D #A88328 #28A843

split-complementary

#284DA8 #A84328 #8DA828

monochromatic

#102045 #1C3677 #284DA8 #3D67D1 #6E8EDC

Accessibility & contrast

On white

7.73

#284DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#284DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DA8

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DA8	#FFFFFF	#000000	##FFFFFF
##284DA8	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0459AB

Deuteranopia (green-blind)

#004DA6

Tritanopia (blue-blind)

#006373

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284da8;
/* rgb */ color: rgb(40, 77, 168);
/* oklch */ color: oklch(44.8% 0.153 264.4);

Tailwind

colors: {
  custom: {
    50: '#757ec3',
    500: '#284da8',
    950: '#000000',
  },
}

SCSS

$custom: #284da8;
$custom-light: #757ec3;
$custom-dark: #000000;

JSON

{
  "hex": "#284da8",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 168
  },
  "hsl": {
    "h": 222.656,
    "s": 61.538,
    "l": 40.784
  },
  "oklch": {
    "l": 0.44829,
    "c": 0.15271,
    "h": 264.4
  },
  "luminance": 0.08586
}

Semantic roles & 50–950 ramp

primary

#284DA8

secondary

#C3A969

accent

#B643E5

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #284DA8

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

Preview Lab → · Contrast checker → · Palette generator →