#284F9F#284F9F

#284F9F is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.6% C 0.138 H 262.6°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#284F9F
RGB	rgb(40, 79, 159)
HSL	hsl(220, 60%, 39%)
HSV	hsv(220, 75%, 62%)
CMYK	cmyk(74.8%, 50.3%, 0%, 37.6%)
CIE-LAB	lab(35.09, 15.23, -47.49)
CIE-LCH	lch(35.09, 49.87, 287.79°)
OKLab	oklab(44.56% -0.0176 -0.1364)
OKLCH	oklch(44.56% 0.138 262.6)
XYZ	xyz(9.9268, 8.5452, 33.9204)
Luminance	0.0855 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F9F #9F7828

analogous

#288B9F #284F9F #3D289F

triadic

#284F9F #9F284F #4F9F28

tetradic

#284F9F #9F288B #9F7828 #289F3D

square

#284F9F #9F288B #9F7828 #289F3D

split-complementary

#284F9F #9F3D28 #8B9F28

monochromatic

#0F1E3D #1C376E #284F9F #3768CD #688DD9

Accessibility & contrast

On white

7.75

#284F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#284F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F9F

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F9F	#FFFFFF	#000000	##FFFFFF
##284F9F	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2058A2

Deuteranopia (green-blind)

#004D9D

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284f9f;
/* rgb */ color: rgb(40, 79, 159);
/* oklch */ color: oklch(44.6% 0.138 262.6);

Tailwind

colors: {
  custom: {
    50: '#737fbc',
    500: '#284f9f',
    950: '#000000',
  },
}

SCSS

$custom: #284f9f;
$custom-light: #737fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#284f9f",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 159
  },
  "hsl": {
    "h": 220.336,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44564,
    "c": 0.13759,
    "h": 262.6
  },
  "luminance": 0.08546
}

Semantic roles & 50–950 ramp

primary

#284F9F

secondary

#BFA164

accent

#AF45E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284F9F

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

Preview Lab → · Contrast checker → · Palette generator →