#283D7C#283D7C

#283D7C is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.9% C 0.110 H 267.2°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#283D7C
RGB	rgb(40, 61, 124)
HSL	hsl(225, 51%, 32%)
HSV	hsv(225, 68%, 49%)
CMYK	cmyk(67.7%, 50.8%, 0%, 51.4%)
CIE-LAB	lab(27.42, 13.92, -38.36)
CIE-LCH	lch(27.42, 40.81, 289.95°)
OKLab	oklab(37.93% -0.0054 -0.1099)
OKLCH	oklch(37.93% 0.11 267.2)
XYZ	xyz(6.1807, 5.2433, 19.7512)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D7C #7C6728

analogous

#28677C #283D7C #3D287C

triadic

#283D7C #7C283D #3D7C28

tetradic

#283D7C #7C2867 #7C6728 #287C3D

square

#283D7C #7C2867 #7C6728 #287C3D

split-complementary

#283D7C #7C3D28 #677C28

monochromatic

#0A0F1F #19264E #283D7C #3754AA #5673C8

Accessibility & contrast

On white

10.25

#283D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D7C

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D7C	#FFFFFF	#000000	##FFFFFF
##283D7C	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B457E

Deuteranopia (green-blind)

#073D7B

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283d7c;
/* rgb */ color: rgb(40, 61, 124);
/* oklch */ color: oklch(37.9% 0.110 267.2);

Tailwind

colors: {
  custom: {
    50: '#6c72a2',
    500: '#283d7c',
    950: '#000000',
  },
}

SCSS

$custom: #283d7c;
$custom-light: #6c72a2;
$custom-dark: #000000;

JSON

{
  "hex": "#283d7c",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 124
  },
  "hsl": {
    "h": 225,
    "s": 51.22,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37929,
    "c": 0.11003,
    "h": 267.2
  },
  "luminance": 0.05244
}

Semantic roles & 50–950 ramp

primary

#283D7C

secondary

#AD9752

accent

#B74DDB

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #283D7C

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

Preview Lab → · Contrast checker → · Palette generator →