#284D8D#284D8D

#284D8D is a dark, moderate blue. Relative luminance 0.077; OKLCH L 42.8% C 0.114 H 260.6°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#284D8D
RGB	rgb(40, 77, 141)
HSL	hsl(218, 56%, 35%)
HSV	hsv(218, 72%, 55%)
CMYK	cmyk(71.6%, 45.4%, 0%, 44.7%)
CIE-LAB	lab(33.31, 9.60, -39.44)
CIE-LCH	lch(33.31, 40.59, 283.68°)
OKLab	oklab(42.81% -0.0188 -0.1128)
OKLCH	oklch(42.81% 0.114 260.6)
XYZ	xyz(8.3349, 7.6811, 26.2375)
Luminance	0.0768 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D8D #8D6828

analogous

#287F8D #284D8D #36288D

triadic

#284D8D #8D284D #4D8D28

tetradic

#284D8D #8D287F #8D6828 #288D36

square

#284D8D #8D287F #8D6828 #288D36

split-complementary

#284D8D #8D3628 #7F8D28

monochromatic

#0D192E #1A335D #284D8D #3667BD #5E88D1

Accessibility & contrast

On white

8.28

#284D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#284D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D8D

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D8D	#FFFFFF	#000000	##FFFFFF
##284D8D	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E538F

Deuteranopia (green-blind)

#1B4A8C

Tritanopia (blue-blind)

#005C66

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #284d8d;
/* rgb */ color: rgb(40, 77, 141);
/* oklch */ color: oklch(42.8% 0.114 260.6);

Tailwind

colors: {
  custom: {
    50: '#6f7eaf',
    500: '#284d8d',
    950: '#000000',
  },
}

SCSS

$custom: #284d8d;
$custom-light: #6f7eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#284d8d",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 141
  },
  "hsl": {
    "h": 218.02,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.42811,
    "c": 0.11436,
    "h": 260.6
  },
  "luminance": 0.07682
}

Semantic roles & 50–950 ramp

primary

#284D8D

secondary

#B7955A

accent

#A849DF

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284D8D

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

Preview Lab → · Contrast checker → · Palette generator →