#283B6E#283B6E

#283B6E is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.091 H 266.5°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#283B6E
RGB	rgb(40, 59, 110)
HSL	hsl(224, 47%, 29%)
HSV	hsv(224, 64%, 43%)
CMYK	cmyk(63.6%, 46.4%, 0%, 56.9%)
CIE-LAB	lab(25.88, 9.95, -31.96)
CIE-LCH	lch(25.88, 33.47, 287.30°)
OKLab	oklab(36.45% -0.0055 -0.0911)
OKLCH	oklch(36.45% 0.091 266.5)
XYZ	xyz(5.2525, 4.7044, 15.3801)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B6E #6E5B28

analogous

#285E6E #283B6E #38286E

triadic

#283B6E #6E283B #3B6E28

tetradic

#283B6E #6E285E #6E5B28 #286E38

square

#283B6E #6E285E #6E5B28 #286E38

split-complementary

#283B6E #6E3828 #5E6E28

monochromatic

#080C16 #182341 #283B6E #38539B #516FC0

Accessibility & contrast

On white

10.82

#283B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B6E

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B6E	#FFFFFF	#000000	##FFFFFF
##283B6E	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244170

Deuteranopia (green-blind)

#193A6D

Tritanopia (blue-blind)

#00464F

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283b6e;
/* rgb */ color: rgb(40, 59, 110);
/* oklch */ color: oklch(36.4% 0.091 266.5);

Tailwind

colors: {
  custom: {
    50: '#697098',
    500: '#283b6e',
    950: '#000000',
  },
}

SCSS

$custom: #283b6e;
$custom-light: #697098;
$custom-dark: #000000;

JSON

{
  "hex": "#283b6e",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 110
  },
  "hsl": {
    "h": 223.714,
    "s": 46.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.36448,
    "c": 0.09128,
    "h": 266.5
  },
  "luminance": 0.04705
}

Semantic roles & 50–950 ramp

primary

#283B6E

secondary

#A08B51

accent

#B251D6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283B6E

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

Preview Lab → · Contrast checker → · Palette generator →