#283D7B#283D7B

#283D7B is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.9% C 0.109 H 267.1°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#283D7B
RGB	rgb(40, 61, 123)
HSL	hsl(225, 51%, 32%)
HSV	hsv(225, 67%, 48%)
CMYK	cmyk(67.5%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(27.35, 13.54, -37.84)
CIE-LCH	lch(27.35, 40.19, 289.68°)
OKLab	oklab(37.85% -0.0056 -0.1084)
OKLCH	oklch(37.85% 0.109 267.1)
XYZ	xyz(6.1177, 5.2181, 19.4198)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D7B #7B6628

analogous

#28677B #283D7B #3D287B

triadic

#283D7B #7B283D #3D7B28

tetradic

#283D7B #7B2867 #7B6628 #287B3D

square

#283D7B #7B2867 #7B6628 #287B3D

split-complementary

#283D7B #7B3D28 #677B28

monochromatic

#0A0F1F #19264D #283D7B #3754A9 #5672C8

Accessibility & contrast

On white

10.27

#283D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#283D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D7B

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D7B	#FFFFFF	#000000	##FFFFFF
##283D7B	1.00	10.27	2.04	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C457D

Deuteranopia (green-blind)

#093D7A

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283d7b;
/* rgb */ color: rgb(40, 61, 123);
/* oklch */ color: oklch(37.9% 0.109 267.1);

Tailwind

colors: {
  custom: {
    50: '#6c72a2',
    500: '#283d7b',
    950: '#000000',
  },
}

SCSS

$custom: #283d7b;
$custom-light: #6c72a2;
$custom-dark: #000000;

JSON

{
  "hex": "#283d7b",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 224.819,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.37854,
    "c": 0.10851,
    "h": 267.1
  },
  "luminance": 0.05219
}

Semantic roles & 50–950 ramp

primary

#283D7B

secondary

#AD9652

accent

#B74DDA

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #283D7B

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

Preview Lab → · Contrast checker → · Palette generator →