#284B8D#284B8D

#284B8D is a dark, moderate blue. Relative luminance 0.074; OKLCH L 42.4% C 0.117 H 261.7°. Best body text is #FFFFFF at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#284B8D
RGB	rgb(40, 75, 141)
HSL	hsl(219, 56%, 35%)
HSV	hsv(219, 72%, 55%)
CMYK	cmyk(71.6%, 46.8%, 0%, 44.7%)
CIE-LAB	lab(32.71, 10.94, -40.40)
CIE-LCH	lch(32.71, 41.85, 285.15°)
OKLab	oklab(42.35% -0.0168 -0.1156)
OKLCH	oklch(42.35% 0.117 261.7)
XYZ	xyz(8.1972, 7.4055, 26.1915)
Luminance	0.0741 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B8D #8D6A28

analogous

#287D8D #284B8D #37288D

triadic

#284B8D #8D284B #4B8D28

tetradic

#284B8D #8D287D #8D6A28 #288D37

square

#284B8D #8D287D #8D6A28 #288D37

split-complementary

#284B8D #8D3728 #7D8D28

monochromatic

#0D182E #1A325D #284B8D #3664BD #5E86D1

Accessibility & contrast

On white

8.46

#284B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#284B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B8D

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B8D	#FFFFFF	#000000	##FFFFFF
##284B8D	1.00	8.46	2.48	8.46
#FFFFFF	8.46	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A528F

Deuteranopia (green-blind)

#15498C

Tritanopia (blue-blind)

#005A65

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #284b8d;
/* rgb */ color: rgb(40, 75, 141);
/* oklch */ color: oklch(42.4% 0.117 261.7);

Tailwind

colors: {
  custom: {
    50: '#6f7caf',
    500: '#284b8d',
    950: '#000000',
  },
}

SCSS

$custom: #284b8d;
$custom-light: #6f7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#284b8d",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 141
  },
  "hsl": {
    "h": 219.208,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.42351,
    "c": 0.11686,
    "h": 261.7
  },
  "luminance": 0.07406
}

Semantic roles & 50–950 ramp

primary

#284B8D

secondary

#B7975A

accent

#AB49DF

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284B8D

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

Preview Lab → · Contrast checker → · Palette generator →