#284C8B#284C8B

#284C8B is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.4% C 0.113 H 260.7°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#284C8B
RGB	rgb(40, 76, 139)
HSL	hsl(218, 55%, 35%)
HSV	hsv(218, 71%, 55%)
CMYK	cmyk(71.2%, 45.3%, 0%, 45.5%)
CIE-LAB	lab(32.88, 9.49, -38.90)
CIE-LCH	lch(32.88, 40.04, 283.72°)
OKLab	oklab(42.44% -0.0182 -0.1112)
OKLCH	oklch(42.44% 0.113 260.7)
XYZ	xyz(8.1180, 7.4832, 25.4377)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284C8B #8B6728

analogous

#287D8B #284C8B #36288B

triadic

#284C8B #8B284C #4C8B28

tetradic

#284C8B #8B287D #8B6728 #288B36

square

#284C8B #8B287D #8B6728 #288B36

split-complementary

#284C8B #8B3628 #7D8B28

monochromatic

#0D182C #1A325B #284C8B #3666BB #5D87D0

Accessibility & contrast

On white

8.41

#284C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#284C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284C8B

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284C8B	#FFFFFF	#000000	##FFFFFF
##284C8B	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D528D

Deuteranopia (green-blind)

#1B498A

Tritanopia (blue-blind)

#005B64

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #284c8b;
/* rgb */ color: rgb(40, 76, 139);
/* oklch */ color: oklch(42.4% 0.113 260.7);

Tailwind

colors: {
  custom: {
    50: '#6e7dad',
    500: '#284c8b',
    950: '#000000',
  },
}

SCSS

$custom: #284c8b;
$custom-light: #6e7dad;
$custom-dark: #000000;

JSON

{
  "hex": "#284c8b",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 139
  },
  "hsl": {
    "h": 218.182,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.4244,
    "c": 0.1127,
    "h": 260.7
  },
  "luminance": 0.07484
}

Semantic roles & 50–950 ramp

primary

#284C8B

secondary

#B69459

accent

#A849DF

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284C8B

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

Preview Lab → · Contrast checker → · Palette generator →