#283F74#283F74

#283F74 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.095 H 264.6°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#283F74
RGB	rgb(40, 63, 116)
HSL	hsl(222, 49%, 31%)
HSV	hsv(222, 66%, 45%)
CMYK	cmyk(65.5%, 45.7%, 0%, 54.5%)
CIE-LAB	lab(27.48, 9.47, -33.21)
CIE-LCH	lch(27.48, 34.54, 285.92°)
OKLab	oklab(37.81% -0.0089 -0.0947)
OKLCH	oklch(37.81% 0.095 264.6)
XYZ	xyz(5.8039, 5.2666, 17.2303)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F74 #745D28

analogous

#286574 #283F74 #372874

triadic

#283F74 #74283F #3F7428

tetradic

#283F74 #742865 #745D28 #287437

square

#283F74 #742865 #745D28 #287437

split-complementary

#283F74 #743728 #657428

monochromatic

#090E19 #182646 #283F74 #3858A2 #5375C4

Accessibility & contrast

On white

10.23

#283F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F74

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F74	#FFFFFF	#000000	##FFFFFF
##283F74	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264576

Deuteranopia (green-blind)

#1B3E73

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f74;
/* rgb */ color: rgb(40, 63, 116);
/* oklch */ color: oklch(37.8% 0.095 264.6);

Tailwind

colors: {
  custom: {
    50: '#6a739c',
    500: '#283f74',
    950: '#000000',
  },
}

SCSS

$custom: #283f74;
$custom-light: #6a739c;
$custom-dark: #000000;

JSON

{
  "hex": "#283f74",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 116
  },
  "hsl": {
    "h": 221.842,
    "s": 48.718,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37806,
    "c": 0.09515,
    "h": 264.6
  },
  "luminance": 0.05267
}

Semantic roles & 50–950 ramp

primary

#283F74

secondary

#A68D52

accent

#AF50D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F74

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

Preview Lab → · Contrast checker → · Palette generator →