#283F7D#283F7D

#283F7D is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.5% C 0.109 H 266.1°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#283F7D
RGB	rgb(40, 63, 125)
HSL	hsl(224, 52%, 32%)
HSV	hsv(224, 68%, 49%)
CMYK	cmyk(68%, 49.6%, 0%, 51%)
CIE-LAB	lab(28.08, 12.93, -37.93)
CIE-LCH	lch(28.08, 40.07, 288.82°)
OKLab	oklab(38.46% -0.0074 -0.1086)
OKLCH	oklch(38.46% 0.109 266.1)
XYZ	xyz(6.3530, 5.4862, 20.1222)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F7D #7D6628

analogous

#28697D #283F7D #3C287D

triadic

#283F7D #7D283F #3F7D28

tetradic

#283F7D #7D2869 #7D6628 #287D3C

square

#283F7D #7D2869 #7D6628 #287D3C

split-complementary

#283F7D #7D3C28 #697D28

monochromatic

#0A1020 #19284F #283F7D #3756AB #5675C9

Accessibility & contrast

On white

10.01

#283F7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#283F7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F7D

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F7D	#FFFFFF	#000000	##FFFFFF
##283F7D	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F467F

Deuteranopia (green-blind)

#0C3F7C

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283f7d;
/* rgb */ color: rgb(40, 63, 125);
/* oklch */ color: oklch(38.5% 0.109 266.1);

Tailwind

colors: {
  custom: {
    50: '#6c73a3',
    500: '#283f7d',
    950: '#000000',
  },
}

SCSS

$custom: #283f7d;
$custom-light: #6c73a3;
$custom-dark: #000000;

JSON

{
  "hex": "#283f7d",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 125
  },
  "hsl": {
    "h": 223.765,
    "s": 51.515,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38455,
    "c": 0.10884,
    "h": 266.1
  },
  "luminance": 0.05487
}

Semantic roles & 50–950 ramp

primary

#283F7D

secondary

#AE9553

accent

#B54DDB

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #283F7D

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

Preview Lab → · Contrast checker → · Palette generator →