#284CB3#284CB3

#284CB3 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.5% C 0.169 H 265.4°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#284CB3
RGB	rgb(40, 76, 179)
HSL	hsl(224, 63%, 43%)
HSV	hsv(224, 78%, 70%)
CMYK	cmyk(77.7%, 57.5%, 0%, 29.8%)
CIE-LAB	lab(35.74, 24.95, -58.37)
CIE-LCH	lch(35.74, 63.48, 293.15°)
OKLab	oklab(45.52% -0.0135 -0.1685)
OKLCH	oklch(45.52% 0.169 265.4)
XYZ	xyz(11.5933, 8.8734, 43.7408)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CB3 #B38F28

analogous

#2892B3 #284CB3 #4928B3

triadic

#284CB3 #B3284C #4CB328

tetradic

#284CB3 #B32892 #B38F28 #28B349

square

#284CB3 #B32892 #B38F28 #28B349

split-complementary

#284CB3 #B34928 #92B328

monochromatic

#12224F #1D3781 #284CB3 #4369D5 #7591E0

Accessibility & contrast

On white

7.57

#284CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#284CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CB3

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CB3	#FFFFFF	#000000	##FFFFFF
##284CB3	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB7

Deuteranopia (green-blind)

#004EB1

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284cb3;
/* rgb */ color: rgb(40, 76, 179);
/* oklch */ color: oklch(45.5% 0.169 265.4);

Tailwind

colors: {
  custom: {
    50: '#787dcb',
    500: '#284cb3',
    950: '#000000',
  },
}

SCSS

$custom: #284cb3;
$custom-light: #787dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#284cb3",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 179
  },
  "hsl": {
    "h": 224.46,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45521,
    "c": 0.16904,
    "h": 265.4
  },
  "luminance": 0.08875
}

Semantic roles & 50–950 ramp

primary

#284CB3

secondary

#C8B16F

accent

#BC41E6

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284CB3

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

Preview Lab → · Contrast checker → · Palette generator →