#283C7B#283C7B

#283C7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.110 H 267.6°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#283C7B
RGB	rgb(40, 60, 123)
HSL	hsl(226, 51%, 32%)
HSV	hsv(226, 67%, 48%)
CMYK	cmyk(67.5%, 51.2%, 0%, 51.8%)
CIE-LAB	lab(27.05, 14.23, -38.32)
CIE-LCH	lch(27.05, 40.87, 290.38°)
OKLab	oklab(37.63% -0.0045 -0.1098)
OKLCH	oklch(37.63% 0.11 267.6)
XYZ	xyz(6.0649, 5.1123, 19.4022)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C7B #7B6728

analogous

#28667B #283C7B #3E287B

triadic

#283C7B #7B283C #3C7B28

tetradic

#283C7B #7B2866 #7B6728 #287B3E

square

#283C7B #7B2866 #7B6728 #287B3E

split-complementary

#283C7B #7B3E28 #667B28

monochromatic

#0A0F1F #19254D #283C7B #3753A9 #5671C8

Accessibility & contrast

On white

10.38

#283C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C7B

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C7B	#FFFFFF	#000000	##FFFFFF
##283C7B	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447D

Deuteranopia (green-blind)

#053C7A

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283c7b;
/* rgb */ color: rgb(40, 60, 123);
/* oklch */ color: oklch(37.6% 0.110 267.6);

Tailwind

colors: {
  custom: {
    50: '#6c71a2',
    500: '#283c7b',
    950: '#000000',
  },
}

SCSS

$custom: #283c7b;
$custom-light: #6c71a2;
$custom-dark: #000000;

JSON

{
  "hex": "#283c7b",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 123
  },
  "hsl": {
    "h": 225.542,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.37629,
    "c": 0.10988,
    "h": 267.6
  },
  "luminance": 0.05113
}

Semantic roles & 50–950 ramp

primary

#283C7B

secondary

#AD9752

accent

#B84DDA

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #283C7B

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

Preview Lab → · Contrast checker → · Palette generator →