#283B6B#283B6B

#283B6B is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.087 H 266.0°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#283B6B
RGB	rgb(40, 59, 107)
HSL	hsl(223, 46%, 29%)
HSV	hsv(223, 63%, 42%)
CMYK	cmyk(62.6%, 44.9%, 0%, 58%)
CIE-LAB	lab(25.68, 8.82, -30.34)
CIE-LCH	lch(25.68, 31.60, 286.20°)
OKLab	oklab(36.24% -0.0061 -0.0864)
OKLCH	oklch(36.24% 0.087 266)
XYZ	xyz(5.0920, 4.6402, 14.5344)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B6B #6B5828

analogous

#285D6B #283B6B #37286B

triadic

#283B6B #6B283B #3B6B28

tetradic

#283B6B #6B285D #6B5828 #286B37

square

#283B6B #6B285D #6B5828 #286B37

split-complementary

#283B6B #6B3728 #5D6B28

monochromatic

#080C16 #17223E #283B6B #395498 #506FBE

Accessibility & contrast

On white

10.89

#283B6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#283B6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B6B

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B6B	#FFFFFF	#000000	##FFFFFF
##283B6B	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26406D

Deuteranopia (green-blind)

#1C3A6A

Tritanopia (blue-blind)

#00464D

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283b6b;
/* rgb */ color: rgb(40, 59, 107);
/* oklch */ color: oklch(36.2% 0.087 266.0);

Tailwind

colors: {
  custom: {
    50: '#697096',
    500: '#283b6b',
    950: '#000000',
  },
}

SCSS

$custom: #283b6b;
$custom-light: #697096;
$custom-dark: #000000;

JSON

{
  "hex": "#283b6b",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 107
  },
  "hsl": {
    "h": 222.985,
    "s": 45.578,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36238,
    "c": 0.08658,
    "h": 266
  },
  "luminance": 0.04641
}

Semantic roles & 50–950 ramp

primary

#283B6B

secondary

#9D8851

accent

#B053D5

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283B6B

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

Preview Lab → · Contrast checker → · Palette generator →