#283A6A#283A6A

#283A6A is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.9% C 0.086 H 266.6°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#283A6A
RGB	rgb(40, 58, 106)
HSL	hsl(224, 45%, 29%)
HSV	hsv(224, 62%, 42%)
CMYK	cmyk(62.3%, 45.3%, 0%, 58.4%)
CIE-LAB	lab(25.31, 9.13, -30.29)
CIE-LCH	lch(25.31, 31.64, 286.78°)
OKLab	oklab(35.93% -0.0051 -0.0862)
OKLCH	oklch(35.93% 0.086 266.6)
XYZ	xyz(4.9888, 4.5174, 14.2419)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A6A #6A5828

analogous

#285B6A #283A6A #37286A

triadic

#283A6A #6A283A #3A6A28

tetradic

#283A6A #6A285B #6A5828 #286A37

square

#283A6A #6A285B #6A5828 #286A37

split-complementary

#283A6A #6A3728 #5B6A28

monochromatic

#080C16 #17223E #283A6A #395296 #506DBD

Accessibility & contrast

On white

11.03

#283A6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#283A6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A6A

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A6A	#FFFFFF	#000000	##FFFFFF
##283A6A	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253F6C

Deuteranopia (green-blind)

#1C3969

Tritanopia (blue-blind)

#00454C

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283a6a;
/* rgb */ color: rgb(40, 58, 106);
/* oklch */ color: oklch(35.9% 0.086 266.6);

Tailwind

colors: {
  custom: {
    50: '#686f95',
    500: '#283a6a',
    950: '#000000',
  },
}

SCSS

$custom: #283a6a;
$custom-light: #686f95;
$custom-dark: #000000;

JSON

{
  "hex": "#283a6a",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 106
  },
  "hsl": {
    "h": 223.636,
    "s": 45.205,
    "l": 28.627
  },
  "oklch": {
    "l": 0.35933,
    "c": 0.08639,
    "h": 266.6
  },
  "luminance": 0.04518
}

Semantic roles & 50–950 ramp

primary

#283A6A

secondary

#9D8851

accent

#B153D5

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283A6A

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

Preview Lab → · Contrast checker → · Palette generator →