#283B6C#283B6C

#283B6C is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.088 H 266.2°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#283B6C
RGB	rgb(40, 59, 108)
HSL	hsl(223, 46%, 29%)
HSV	hsv(223, 63%, 42%)
CMYK	cmyk(63%, 45.4%, 0%, 57.6%)
CIE-LAB	lab(25.75, 9.20, -30.89)
CIE-LCH	lch(25.75, 32.22, 286.58°)
OKLab	oklab(36.31% -0.0059 -0.088)
OKLCH	oklch(36.31% 0.088 266.2)
XYZ	xyz(5.1449, 4.6613, 14.8131)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B6C #6C5928

analogous

#285D6C #283B6C #37286C

triadic

#283B6C #6C283B #3B6C28

tetradic

#283B6C #6C285D #6C5928 #286C37

square

#283B6C #6C285D #6C5928 #286C37

split-complementary

#283B6C #6C3728 #5D6C28

monochromatic

#080C16 #17233F #283B6C #395399 #506FBE

Accessibility & contrast

On white

10.87

#283B6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#283B6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B6C

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B6C	#FFFFFF	#000000	##FFFFFF
##283B6C	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25406E

Deuteranopia (green-blind)

#1B3A6B

Tritanopia (blue-blind)

#00464E

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283b6c;
/* rgb */ color: rgb(40, 59, 108);
/* oklch */ color: oklch(36.3% 0.088 266.2);

Tailwind

colors: {
  custom: {
    50: '#697096',
    500: '#283b6c',
    950: '#000000',
  },
}

SCSS

$custom: #283b6c;
$custom-light: #697096;
$custom-dark: #000000;

JSON

{
  "hex": "#283b6c",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 108
  },
  "hsl": {
    "h": 223.235,
    "s": 45.946,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36308,
    "c": 0.08816,
    "h": 266.2
  },
  "luminance": 0.04662
}

Semantic roles & 50–950 ramp

primary

#283B6C

secondary

#9E8951

accent

#B152D6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283B6C

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

Preview Lab → · Contrast checker → · Palette generator →