#283F6A#283F6A

#283F6A is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.080 H 261.9°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#283F6A
RGB	rgb(40, 63, 106)
HSL	hsl(219, 45%, 29%)
HSV	hsv(219, 62%, 42%)
CMYK	cmyk(62.3%, 40.6%, 0%, 58.4%)
CIE-LAB	lab(26.87, 5.69, -27.83)
CIE-LCH	lch(26.87, 28.40, 281.56°)
OKLab	oklab(37.13% -0.0112 -0.0789)
OKLCH	oklch(37.13% 0.08 261.9)
XYZ	xyz(5.2532, 5.0463, 14.3301)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6A #6A5328

analogous

#28606A #283F6A #32286A

triadic

#283F6A #6A283F #3F6A28

tetradic

#283F6A #6A2860 #6A5328 #286A32

square

#283F6A #6A2860 #6A5328 #286A32

split-complementary

#283F6A #6A3228 #606A28

monochromatic

#080D16 #17253E #283F6A #395996 #5076BD

Accessibility & contrast

On white

10.45

#283F6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283F6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6A

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6A	#FFFFFF	#000000	##FFFFFF
##283F6A	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D436C

Deuteranopia (green-blind)

#243D69

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283f6a;
/* rgb */ color: rgb(40, 63, 106);
/* oklch */ color: oklch(37.1% 0.080 261.9);

Tailwind

colors: {
  custom: {
    50: '#687395',
    500: '#283f6a',
    950: '#000000',
  },
}

SCSS

$custom: #283f6a;
$custom-light: #687395;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6a",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 106
  },
  "hsl": {
    "h": 219.091,
    "s": 45.205,
    "l": 28.627
  },
  "oklch": {
    "l": 0.37131,
    "c": 0.07973,
    "h": 261.9
  },
  "luminance": 0.05047
}

Semantic roles & 50–950 ramp

primary

#283F6A

secondary

#9D8251

accent

#A853D5

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #283F6A

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

Preview Lab → · Contrast checker → · Palette generator →