#283B71#283B71

#283B71 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.096 H 267.0°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#283B71
RGB	rgb(40, 59, 113)
HSL	hsl(224, 48%, 30%)
HSV	hsv(224, 65%, 44%)
CMYK	cmyk(64.6%, 47.8%, 0%, 55.7%)
CIE-LAB	lab(26.07, 11.09, -33.56)
CIE-LCH	lch(26.07, 35.35, 288.29°)
OKLab	oklab(36.66% -0.005 -0.0958)
OKLCH	oklch(36.66% 0.096 267)
XYZ	xyz(5.4187, 4.7708, 16.2549)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B71 #715E28

analogous

#285F71 #283B71 #3A2871

triadic

#283B71 #71283B #3B7128

tetradic

#283B71 #71285F #715E28 #28713A

square

#283B71 #71285F #715E28 #28713A

split-complementary

#283B71 #713A28 #5F7128

monochromatic

#080C17 #182344 #283B71 #38539E #526FC2

Accessibility & contrast

On white

10.75

#283B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B71

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B71	#FFFFFF	#000000	##FFFFFF
##283B71	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214173

Deuteranopia (green-blind)

#163B70

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b71;
/* rgb */ color: rgb(40, 59, 113);
/* oklch */ color: oklch(36.7% 0.096 267.0);

Tailwind

colors: {
  custom: {
    50: '#6a709a',
    500: '#283b71',
    950: '#000000',
  },
}

SCSS

$custom: #283b71;
$custom-light: #6a709a;
$custom-dark: #000000;

JSON

{
  "hex": "#283b71",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 113
  },
  "hsl": {
    "h": 224.384,
    "s": 47.712,
    "l": 30
  },
  "oklch": {
    "l": 0.36661,
    "c": 0.09594,
    "h": 267
  },
  "luminance": 0.04771
}

Semantic roles & 50–950 ramp

primary

#283B71

secondary

#A38E52

accent

#B450D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B71

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

Preview Lab → · Contrast checker → · Palette generator →