#283C79#283C79

#283C79 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.107 H 267.4°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#283C79
RGB	rgb(40, 60, 121)
HSL	hsl(225, 50%, 32%)
HSV	hsv(225, 67%, 47%)
CMYK	cmyk(66.9%, 50.4%, 0%, 52.5%)
CIE-LAB	lab(26.91, 13.46, -37.28)
CIE-LCH	lch(26.91, 39.64, 289.85°)
OKLab	oklab(37.48% -0.0048 -0.1067)
OKLCH	oklch(37.48% 0.107 267.4)
XYZ	xyz(5.9409, 5.0628, 18.7496)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C79 #796528

analogous

#286579 #283C79 #3D2879

triadic

#283C79 #79283C #3C7928

tetradic

#283C79 #792865 #796528 #28793D

square

#283C79 #792865 #796528 #28793D

split-complementary

#283C79 #793D28 #657928

monochromatic

#0A0E1D #19254B #283C79 #3753A7 #5571C7

Accessibility & contrast

On white

10.43

#283C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C79

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C79	#FFFFFF	#000000	##FFFFFF
##283C79	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C437B

Deuteranopia (green-blind)

#0A3C78

Tritanopia (blue-blind)

#004A54

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283c79;
/* rgb */ color: rgb(40, 60, 121);
/* oklch */ color: oklch(37.5% 0.107 267.4);

Tailwind

colors: {
  custom: {
    50: '#6b71a0',
    500: '#283c79',
    950: '#000000',
  },
}

SCSS

$custom: #283c79;
$custom-light: #6b71a0;
$custom-dark: #000000;

JSON

{
  "hex": "#283c79",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 121
  },
  "hsl": {
    "h": 225.185,
    "s": 50.311,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37478,
    "c": 0.10685,
    "h": 267.4
  },
  "luminance": 0.05063
}

Semantic roles & 50–950 ramp

primary

#283C79

secondary

#AB9552

accent

#B74EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283C79

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

Preview Lab → · Contrast checker → · Palette generator →