#284B9F#284B9F

#284B9F is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.7% C 0.143 H 264.3°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#284B9F
RGB	rgb(40, 75, 159)
HSL	hsl(222, 60%, 39%)
HSV	hsv(222, 75%, 62%)
CMYK	cmyk(74.8%, 52.8%, 0%, 37.6%)
CIE-LAB	lab(33.95, 17.92, -49.33)
CIE-LCH	lch(33.95, 52.48, 289.96°)
OKLab	oklab(43.7% -0.0143 -0.1419)
OKLCH	oklch(43.7% 0.143 264.3)
XYZ	xyz(9.6469, 7.9854, 33.8271)
Luminance	0.0799 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B9F #9F7C28

analogous

#28879F #284B9F #41289F

triadic

#284B9F #9F284B #4B9F28

tetradic

#284B9F #9F2887 #9F7C28 #289F41

square

#284B9F #9F2887 #9F7C28 #289F41

split-complementary

#284B9F #9F4128 #879F28

monochromatic

#0F1D3D #1C346E #284B9F #3763CD #6889D9

Accessibility & contrast

On white

8.09

#284B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#284B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B9F

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B9F	#FFFFFF	#000000	##FFFFFF
##284B9F	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1256A2

Deuteranopia (green-blind)

#004B9D

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284b9f;
/* rgb */ color: rgb(40, 75, 159);
/* oklch */ color: oklch(43.7% 0.143 264.3);

Tailwind

colors: {
  custom: {
    50: '#737cbc',
    500: '#284b9f',
    950: '#000000',
  },
}

SCSS

$custom: #284b9f;
$custom-light: #737cbc;
$custom-dark: #000000;

JSON

{
  "hex": "#284b9f",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 159
  },
  "hsl": {
    "h": 222.353,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.43695,
    "c": 0.14265,
    "h": 264.3
  },
  "luminance": 0.07986
}

Semantic roles & 50–950 ramp

primary

#284B9F

secondary

#BFA464

accent

#B445E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284B9F

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

Preview Lab → · Contrast checker → · Palette generator →