#283F6F#283F6F

#283F6F is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.5% C 0.087 H 263.5°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#283F6F
RGB	rgb(40, 63, 111)
HSL	hsl(221, 47%, 30%)
HSV	hsv(221, 64%, 44%)
CMYK	cmyk(64%, 43.2%, 0%, 56.5%)
CIE-LAB	lab(27.17, 7.57, -30.54)
CIE-LCH	lch(27.17, 31.46, 283.93°)
OKLab	oklab(37.46% -0.01 -0.0869)
OKLCH	oklch(37.46% 0.087 263.5)
XYZ	xyz(5.5208, 5.1533, 15.7396)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6F #6F5828

analogous

#28636F #283F6F #34286F

triadic

#283F6F #6F283F #3F6F28

tetradic

#283F6F #6F2863 #6F5828 #286F34

square

#283F6F #6F2863 #6F5828 #286F34

split-complementary

#283F6F #6F3428 #636F28

monochromatic

#080D16 #182542 #283F6F #38599C #5175C0

Accessibility & contrast

On white

10.34

#283F6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#283F6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6F

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6F	#FFFFFF	#000000	##FFFFFF
##283F6F	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4471

Deuteranopia (green-blind)

#203D6E

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f6f;
/* rgb */ color: rgb(40, 63, 111);
/* oklch */ color: oklch(37.5% 0.087 263.5);

Tailwind

colors: {
  custom: {
    50: '#697398',
    500: '#283f6f',
    950: '#000000',
  },
}

SCSS

$custom: #283f6f;
$custom-light: #697398;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6f",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 111
  },
  "hsl": {
    "h": 220.563,
    "s": 47.02,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37462,
    "c": 0.08746,
    "h": 263.5
  },
  "luminance": 0.05154
}

Semantic roles & 50–950 ramp

primary

#283F6F

secondary

#A18751

accent

#AB51D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F6F

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

Preview Lab → · Contrast checker → · Palette generator →