#283E7B#283E7B

#283E7B is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.1% C 0.107 H 266.5°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#283E7B
RGB	rgb(40, 62, 123)
HSL	hsl(224, 51%, 32%)
HSV	hsv(224, 67%, 48%)
CMYK	cmyk(67.5%, 49.6%, 0%, 51.8%)
CIE-LAB	lab(27.64, 12.85, -37.37)
CIE-LCH	lch(27.64, 39.51, 288.97°)
OKLab	oklab(38.08% -0.0066 -0.107)
OKLCH	oklch(38.08% 0.107 266.5)
XYZ	xyz(6.1716, 5.3259, 19.4378)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283E7B #7B6528

analogous

#28687B #283E7B #3B287B

triadic

#283E7B #7B283E #3E7B28

tetradic

#283E7B #7B2868 #7B6528 #287B3B

square

#283E7B #7B2868 #7B6528 #287B3B

split-complementary

#283E7B #7B3B28 #687B28

monochromatic

#0A0F1F #19274D #283E7B #3755A9 #5674C8

Accessibility & contrast

On white

10.17

#283E7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283E7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283E7B

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283E7B	#FFFFFF	#000000	##FFFFFF
##283E7B	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F457D

Deuteranopia (green-blind)

#0D3E7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283e7b;
/* rgb */ color: rgb(40, 62, 123);
/* oklch */ color: oklch(38.1% 0.107 266.5);

Tailwind

colors: {
  custom: {
    50: '#6c72a2',
    500: '#283e7b',
    950: '#000000',
  },
}

SCSS

$custom: #283e7b;
$custom-light: #6c72a2;
$custom-dark: #000000;

JSON

{
  "hex": "#283e7b",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 123
  },
  "hsl": {
    "h": 224.096,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.3808,
    "c": 0.10717,
    "h": 266.5
  },
  "luminance": 0.05326
}

Semantic roles & 50–950 ramp

primary

#283E7B

secondary

#AD9552

accent

#B54DDA

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #283E7B

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

Preview Lab → · Contrast checker → · Palette generator →