#283F75#283F75

#283F75 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.9% C 0.097 H 264.8°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#283F75
RGB	rgb(40, 63, 117)
HSL	hsl(222, 49%, 31%)
HSV	hsv(222, 66%, 46%)
CMYK	cmyk(65.8%, 46.2%, 0%, 54.1%)
CIE-LAB	lab(27.55, 9.86, -33.74)
CIE-LCH	lch(27.55, 35.15, 286.28°)
OKLab	oklab(37.88% -0.0087 -0.0963)
OKLCH	oklch(37.88% 0.097 264.8)
XYZ	xyz(5.8624, 5.2900, 17.5383)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F75 #755E28

analogous

#286575 #283F75 #372875

triadic

#283F75 #75283F #3F7528

tetradic

#283F75 #752865 #755E28 #287537

square

#283F75 #752865 #755E28 #287537

split-complementary

#283F75 #753728 #657528

monochromatic

#090E1A #182647 #283F75 #3858A3 #5375C4

Accessibility & contrast

On white

10.20

#283F75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#283F75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F75

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F75	#FFFFFF	#000000	##FFFFFF
##283F75	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264577

Deuteranopia (green-blind)

#193E74

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f75;
/* rgb */ color: rgb(40, 63, 117);
/* oklch */ color: oklch(37.9% 0.097 264.8);

Tailwind

colors: {
  custom: {
    50: '#6a739d',
    500: '#283f75',
    950: '#000000',
  },
}

SCSS

$custom: #283f75;
$custom-light: #6a739d;
$custom-dark: #000000;

JSON

{
  "hex": "#283f75",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 117
  },
  "hsl": {
    "h": 222.078,
    "s": 49.045,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37876,
    "c": 0.09668,
    "h": 264.8
  },
  "luminance": 0.0529
}

Semantic roles & 50–950 ramp

primary

#283F75

secondary

#A78E52

accent

#B04FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F75

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

Preview Lab → · Contrast checker → · Palette generator →