#284FC9#284FC9

#284FC9 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 48.0% C 0.195 H 265.6°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#284FC9
RGB	rgb(40, 79, 201)
HSL	hsl(225, 67%, 47%)
HSV	hsv(225, 80%, 79%)
CMYK	cmyk(80.1%, 60.7%, 0%, 21.2%)
CIE-LAB	lab(38.30, 31.31, -67.07)
CIE-LCH	lch(38.30, 74.02, 295.02°)
OKLab	oklab(47.99% -0.0148 -0.194)
OKLCH	oklch(47.99% 0.195 265.6)
XYZ	xyz(14.2100, 10.2584, 56.4782)
Luminance	0.1026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FC9 #C9A228

analogous

#289FC9 #284FC9 #5228C9

triadic

#284FC9 #C9284F #4FC928

tetradic

#284FC9 #C9289F #C9A228 #28C952

square

#284FC9 #C9289F #C9A228 #28C952

split-complementary

#284FC9 #C95228 #9FC928

monochromatic

#142763 #1E3B96 #284FC9 #5273DD #859CE7

Accessibility & contrast

On white

6.88

#284FC9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#284FC9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #284FC9

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FC9	#FFFFFF	#000000	##FFFFFF
##284FC9	1.00	6.88	3.05	6.88
#FFFFFF	6.88	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062CD

Deuteranopia (green-blind)

#0053C7

Tritanopia (blue-blind)

#006E84

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #284fc9;
/* rgb */ color: rgb(40, 79, 201);
/* oklch */ color: oklch(48.0% 0.195 265.6);

Tailwind

colors: {
  custom: {
    50: '#7d7fda',
    500: '#284fc9',
    950: '#000000',
  },
}

SCSS

$custom: #284fc9;
$custom-light: #7d7fda;
$custom-dark: #000000;

JSON

{
  "hex": "#284fc9",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 201
  },
  "hsl": {
    "h": 225.466,
    "s": 66.805,
    "l": 47.255
  },
  "oklch": {
    "l": 0.47991,
    "c": 0.19456,
    "h": 265.6
  },
  "luminance": 0.1026
}

Semantic roles & 50–950 ramp

primary

#284FC9

secondary

#D0BC7D

accent

#C03EEA

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0B0A15

muted

#7C7C83

Preview Lab

Preview with #284FC9

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

Preview Lab → · Contrast checker → · Palette generator →