#283F69#283F69

#283F69 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.078 H 261.6°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#283F69
RGB	rgb(40, 63, 105)
HSL	hsl(219, 45%, 28%)
HSV	hsv(219, 62%, 41%)
CMYK	cmyk(61.9%, 40%, 0%, 58.8%)
CIE-LAB	lab(26.81, 5.32, -27.28)
CIE-LCH	lch(26.81, 27.79, 281.03°)
OKLab	oklab(37.07% -0.0114 -0.0773)
OKLCH	oklch(37.07% 0.078 261.6)
XYZ	xyz(5.2015, 5.0256, 14.0578)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F69 #695228

analogous

#285F69 #283F69 #312869

triadic

#283F69 #69283F #3F6928

tetradic

#283F69 #69285F #695228 #286931

square

#283F69 #69285F #695228 #286931

split-complementary

#283F69 #693128 #5F6928

monochromatic

#080D16 #17243D #283F69 #395A95 #4F76BC

Accessibility & contrast

On white

10.47

#283F69 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283F69 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F69

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F69	#FFFFFF	#000000	##FFFFFF
##283F69	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D436B

Deuteranopia (green-blind)

#253D68

Tritanopia (blue-blind)

#00484F

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283f69;
/* rgb */ color: rgb(40, 63, 105);
/* oklch */ color: oklch(37.1% 0.078 261.6);

Tailwind

colors: {
  custom: {
    50: '#687394',
    500: '#283f69',
    950: '#000000',
  },
}

SCSS

$custom: #283f69;
$custom-light: #687394;
$custom-dark: #000000;

JSON

{
  "hex": "#283f69",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 105
  },
  "hsl": {
    "h": 218.769,
    "s": 44.828,
    "l": 28.431
  },
  "oklch": {
    "l": 0.37067,
    "c": 0.07818,
    "h": 261.6
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#283F69

secondary

#9C8151

accent

#A753D5

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #283F69

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

Preview Lab → · Contrast checker → · Palette generator →