#284D8F#284D8F

#284D8F is a dark, moderate blue. Relative luminance 0.077; OKLCH L 43.0% C 0.117 H 261.0°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#284D8F
RGB	rgb(40, 77, 143)
HSL	hsl(218, 56%, 36%)
HSV	hsv(218, 72%, 56%)
CMYK	cmyk(72%, 46.2%, 0%, 43.9%)
CIE-LAB	lab(33.44, 10.37, -40.46)
CIE-LCH	lch(33.44, 41.76, 284.38°)
OKLab	oklab(42.95% -0.0184 -0.1158)
OKLCH	oklch(42.95% 0.117 261)
XYZ	xyz(8.4851, 7.7412, 27.0283)
Luminance	0.0774 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D8F #8F6A28

analogous

#28808F #284D8F #37288F

triadic

#284D8F #8F284D #4D8F28

tetradic

#284D8F #8F2880 #8F6A28 #288F37

square

#284D8F #8F2880 #8F6A28 #288F37

split-complementary

#284D8F #8F3728 #808F28

monochromatic

#0D192F #1B335F #284D8F #3567BF #5F88D2

Accessibility & contrast

On white

8.24

#284D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#284D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D8F

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D8F	#FFFFFF	#000000	##FFFFFF
##284D8F	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5492

Deuteranopia (green-blind)

#184A8E

Tritanopia (blue-blind)

#005C67

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284d8f;
/* rgb */ color: rgb(40, 77, 143);
/* oklch */ color: oklch(43.0% 0.117 261.0);

Tailwind

colors: {
  custom: {
    50: '#6f7eb0',
    500: '#284d8f',
    950: '#000000',
  },
}

SCSS

$custom: #284d8f;
$custom-light: #6f7eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#284d8f",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 143
  },
  "hsl": {
    "h": 218.447,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.42951,
    "c": 0.11725,
    "h": 261
  },
  "luminance": 0.07742
}

Semantic roles & 50–950 ramp

primary

#284D8F

secondary

#B8965B

accent

#A948E0

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284D8F

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

Preview Lab → · Contrast checker → · Palette generator →