#283F6D#283F6D

#283F6D is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.084 H 262.9°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#283F6D
RGB	rgb(40, 63, 109)
HSL	hsl(220, 46%, 29%)
HSV	hsv(220, 63%, 43%)
CMYK	cmyk(63.3%, 42.2%, 0%, 57.3%)
CIE-LAB	lab(27.05, 6.82, -29.46)
CIE-LCH	lch(27.05, 30.24, 283.03°)
OKLab	oklab(37.33% -0.0104 -0.0837)
OKLCH	oklch(37.33% 0.084 262.9)
XYZ	xyz(5.4119, 5.1098, 15.1661)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6D #6D5628

analogous

#28626D #283F6D #34286D

triadic

#283F6D #6D283F #3F6D28

tetradic

#283F6D #6D2862 #6D5628 #286D34

square

#283F6D #6D2862 #6D5628 #286D34

split-complementary

#283F6D #6D3428 #626D28

monochromatic

#080D16 #182540 #283F6D #38599A #5075BF

Accessibility & contrast

On white

10.39

#283F6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283F6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6D

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6D	#FFFFFF	#000000	##FFFFFF
##283F6D	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B436F

Deuteranopia (green-blind)

#223D6C

Tritanopia (blue-blind)

#004950

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f6d;
/* rgb */ color: rgb(40, 63, 109);
/* oklch */ color: oklch(37.3% 0.084 262.9);

Tailwind

colors: {
  custom: {
    50: '#697397',
    500: '#283f6d',
    950: '#000000',
  },
}

SCSS

$custom: #283f6d;
$custom-light: #697397;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6d",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 109
  },
  "hsl": {
    "h": 220,
    "s": 46.309,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37328,
    "c": 0.08437,
    "h": 262.9
  },
  "luminance": 0.0511
}

Semantic roles & 50–950 ramp

primary

#283F6D

secondary

#9F8551

accent

#AA52D6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080D

muted

#7A7B7E

Preview Lab

Preview with #283F6D

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

Preview Lab → · Contrast checker → · Palette generator →