#283F79#283F79

#283F79 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.2% C 0.103 H 265.5°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#283F79
RGB	rgb(40, 63, 121)
HSL	hsl(223, 50%, 32%)
HSV	hsv(223, 67%, 47%)
CMYK	cmyk(66.9%, 47.9%, 0%, 52.5%)
CIE-LAB	lab(27.81, 11.39, -35.85)
CIE-LCH	lch(27.81, 37.61, 287.63°)
OKLab	oklab(38.16% -0.008 -0.1025)
OKLCH	oklch(38.16% 0.103 265.5)
XYZ	xyz(6.1026, 5.3860, 18.8035)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F79 #796228

analogous

#286879 #283F79 #3A2879

triadic

#283F79 #79283F #3F7928

tetradic

#283F79 #792868 #796228 #28793A

square

#283F79 #792868 #796228 #28793A

split-complementary

#283F79 #793A28 #687928

monochromatic

#0A0F1D #19274B #283F79 #3757A7 #5575C7

Accessibility & contrast

On white

10.11

#283F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#283F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F79

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F79	#FFFFFF	#000000	##FFFFFF
##283F79	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22467B

Deuteranopia (green-blind)

#143E78

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283f79;
/* rgb */ color: rgb(40, 63, 121);
/* oklch */ color: oklch(38.2% 0.103 265.5);

Tailwind

colors: {
  custom: {
    50: '#6b73a0',
    500: '#283f79',
    950: '#000000',
  },
}

SCSS

$custom: #283f79;
$custom-light: #6b73a0;
$custom-dark: #000000;

JSON

{
  "hex": "#283f79",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 121
  },
  "hsl": {
    "h": 222.963,
    "s": 50.311,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38162,
    "c": 0.10278,
    "h": 265.5
  },
  "luminance": 0.05387
}

Semantic roles & 50–950 ramp

primary

#283F79

secondary

#AB9252

accent

#B24EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #283F79

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

Preview Lab → · Contrast checker → · Palette generator →