#283D6B#283D6B

#283D6B is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.7% C 0.084 H 264.2°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#283D6B
RGB	rgb(40, 61, 107)
HSL	hsl(221, 46%, 29%)
HSV	hsv(221, 63%, 42%)
CMYK	cmyk(62.6%, 43%, 0%, 58%)
CIE-LAB	lab(26.30, 7.44, -29.36)
CIE-LCH	lch(26.30, 30.29, 284.21°)
OKLab	oklab(36.71% -0.0085 -0.0835)
OKLCH	oklch(36.71% 0.084 264.2)
XYZ	xyz(5.1967, 4.8497, 14.5693)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D6B #6B5628

analogous

#285F6B #283D6B #35286B

triadic

#283D6B #6B283D #3D6B28

tetradic

#283D6B #6B285F #6B5628 #286B35

square

#283D6B #6B285F #6B5628 #286B35

split-complementary

#283D6B #6B3528 #5F6B28

monochromatic

#080D16 #17243E #283D6B #395698 #5072BE

Accessibility & contrast

On white

10.66

#283D6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283D6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D6B

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D6B	#FFFFFF	#000000	##FFFFFF
##283D6B	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29426D

Deuteranopia (green-blind)

#203B6A

Tritanopia (blue-blind)

#00474E

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283d6b;
/* rgb */ color: rgb(40, 61, 107);
/* oklch */ color: oklch(36.7% 0.084 264.2);

Tailwind

colors: {
  custom: {
    50: '#687295',
    500: '#283d6b',
    950: '#000000',
  },
}

SCSS

$custom: #283d6b;
$custom-light: #687295;
$custom-dark: #000000;

JSON

{
  "hex": "#283d6b",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 107
  },
  "hsl": {
    "h": 221.194,
    "s": 45.578,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36715,
    "c": 0.08389,
    "h": 264.2
  },
  "luminance": 0.0485
}

Semantic roles & 50–950 ramp

primary

#283D6B

secondary

#9D8651

accent

#AC53D5

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283D6B

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

Preview Lab → · Contrast checker → · Palette generator →