#284C8A#284C8A

#284C8A is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.4% C 0.111 H 260.5°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#284C8A
RGB	rgb(40, 76, 138)
HSL	hsl(218, 55%, 35%)
HSV	hsv(218, 71%, 54%)
CMYK	cmyk(71%, 44.9%, 0%, 45.9%)
CIE-LAB	lab(32.82, 9.11, -38.39)
CIE-LCH	lch(32.82, 39.45, 283.35°)
OKLab	oklab(42.37% -0.0184 -0.1097)
OKLCH	oklch(42.37% 0.111 260.5)
XYZ	xyz(8.0453, 7.4542, 25.0546)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284C8A #8A6628

analogous

#287D8A #284C8A #35288A

triadic

#284C8A #8A284C #4C8A28

tetradic

#284C8A #8A287D #8A6628 #288A35

square

#284C8A #8A287D #8A6628 #288A35

split-complementary

#284C8A #8A3528 #7D8A28

monochromatic

#0C182B #1A325B #284C8A #3666B9 #5D87D0

Accessibility & contrast

On white

8.43

#284C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#284C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284C8A

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284C8A	#FFFFFF	#000000	##FFFFFF
##284C8A	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E528C

Deuteranopia (green-blind)

#1D4989

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #284c8a;
/* rgb */ color: rgb(40, 76, 138);
/* oklch */ color: oklch(42.4% 0.111 260.5);

Tailwind

colors: {
  custom: {
    50: '#6e7dac',
    500: '#284c8a',
    950: '#000000',
  },
}

SCSS

$custom: #284c8a;
$custom-light: #6e7dac;
$custom-dark: #000000;

JSON

{
  "hex": "#284c8a",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 138
  },
  "hsl": {
    "h": 217.959,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.42371,
    "c": 0.11126,
    "h": 260.5
  },
  "luminance": 0.07455
}

Semantic roles & 50–950 ramp

primary

#284C8A

secondary

#B59359

accent

#A849DE

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284C8A

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

Preview Lab → · Contrast checker → · Palette generator →