#283F7C#283F7C

#283F7C is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.4% C 0.107 H 266.0°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#283F7C
RGB	rgb(40, 63, 124)
HSL	hsl(224, 51%, 32%)
HSV	hsv(224, 68%, 49%)
CMYK	cmyk(67.7%, 49.2%, 0%, 51.4%)
CIE-LAB	lab(28.01, 12.54, -37.41)
CIE-LCH	lch(28.01, 39.45, 288.54°)
OKLab	oklab(38.38% -0.0075 -0.1071)
OKLCH	oklch(38.38% 0.107 266)
XYZ	xyz(6.2894, 5.4608, 19.7875)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F7C #7C6528

analogous

#28697C #283F7C #3B287C

triadic

#283F7C #7C283F #3F7C28

tetradic

#283F7C #7C2869 #7C6528 #287C3B

square

#283F7C #7C2869 #7C6528 #287C3B

split-complementary

#283F7C #7C3B28 #697C28

monochromatic

#0A101F #19274E #283F7C #3757AA #5675C8

Accessibility & contrast

On white

10.04

#283F7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283F7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F7C

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F7C	#FFFFFF	#000000	##FFFFFF
##283F7C	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20467E

Deuteranopia (green-blind)

#0F3E7B

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283f7c;
/* rgb */ color: rgb(40, 63, 124);
/* oklch */ color: oklch(38.4% 0.107 266.0);

Tailwind

colors: {
  custom: {
    50: '#6c73a2',
    500: '#283f7c',
    950: '#000000',
  },
}

SCSS

$custom: #283f7c;
$custom-light: #6c73a2;
$custom-dark: #000000;

JSON

{
  "hex": "#283f7c",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 124
  },
  "hsl": {
    "h": 223.571,
    "s": 51.22,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38381,
    "c": 0.10732,
    "h": 266
  },
  "luminance": 0.05461
}

Semantic roles & 50–950 ramp

primary

#283F7C

secondary

#AD9552

accent

#B44DDB

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #283F7C

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

Preview Lab → · Contrast checker → · Palette generator →