#283D79#283D79

#283D79 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.105 H 266.8°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#283D79
RGB	rgb(40, 61, 121)
HSL	hsl(224, 50%, 32%)
HSV	hsv(224, 67%, 47%)
CMYK	cmyk(66.9%, 49.6%, 0%, 52.5%)
CIE-LAB	lab(27.21, 12.77, -36.80)
CIE-LCH	lch(27.21, 38.96, 289.13°)
OKLab	oklab(37.71% -0.0059 -0.1053)
OKLCH	oklch(37.71% 0.105 266.8)
XYZ	xyz(5.9938, 5.1685, 18.7672)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D79 #796428

analogous

#286679 #283D79 #3B2879

triadic

#283D79 #79283D #3D7928

tetradic

#283D79 #792866 #796428 #28793B

square

#283D79 #792866 #796428 #28793B

split-complementary

#283D79 #793B28 #667928

monochromatic

#0A0F1D #19264B #283D79 #3754A7 #5572C7

Accessibility & contrast

On white

10.33

#283D79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#283D79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D79

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D79	#FFFFFF	#000000	##FFFFFF
##283D79	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E447B

Deuteranopia (green-blind)

#0E3D78

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283d79;
/* rgb */ color: rgb(40, 61, 121);
/* oklch */ color: oklch(37.7% 0.105 266.8);

Tailwind

colors: {
  custom: {
    50: '#6b72a0',
    500: '#283d79',
    950: '#000000',
  },
}

SCSS

$custom: #283d79;
$custom-light: #6b72a0;
$custom-dark: #000000;

JSON

{
  "hex": "#283d79",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 121
  },
  "hsl": {
    "h": 224.444,
    "s": 50.311,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37705,
    "c": 0.10548,
    "h": 266.8
  },
  "luminance": 0.05169
}

Semantic roles & 50–950 ramp

primary

#283D79

secondary

#AB9452

accent

#B64EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283D79

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

Preview Lab → · Contrast checker → · Palette generator →