#283B79#283B79

#283B79 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.108 H 268.0°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#283B79
RGB	rgb(40, 59, 121)
HSL	hsl(226, 50%, 32%)
HSV	hsv(226, 67%, 47%)
CMYK	cmyk(66.9%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(26.62, 14.15, -37.76)
CIE-LCH	lch(26.62, 40.32, 290.55°)
OKLab	oklab(37.25% -0.0037 -0.1081)
OKLCH	oklch(37.25% 0.108 268)
XYZ	xyz(5.8890, 4.9590, 18.7323)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B79 #796628

analogous

#286479 #283B79 #3E2879

triadic

#283B79 #79283B #3B7928

tetradic

#283B79 #792864 #796628 #28793E

square

#283B79 #792864 #796628 #28793E

split-complementary

#283B79 #793E28 #647928

monochromatic

#0A0E1D #19254B #283B79 #3751A7 #556FC7

Accessibility & contrast

On white

10.54

#283B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B79

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B79	#FFFFFF	#000000	##FFFFFF
##283B79	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A437B

Deuteranopia (green-blind)

#063B78

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283b79;
/* rgb */ color: rgb(40, 59, 121);
/* oklch */ color: oklch(37.3% 0.108 268.0);

Tailwind

colors: {
  custom: {
    50: '#6b70a0',
    500: '#283b79',
    950: '#000000',
  },
}

SCSS

$custom: #283b79;
$custom-light: #6b70a0;
$custom-dark: #000000;

JSON

{
  "hex": "#283b79",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 225.926,
    "s": 50.311,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37254,
    "c": 0.10821,
    "h": 268
  },
  "luminance": 0.0496
}

Semantic roles & 50–950 ramp

primary

#283B79

secondary

#AB9652

accent

#B94EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283B79

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

Preview Lab → · Contrast checker → · Palette generator →