#283F76#283F76

#283F76 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.9% C 0.098 H 265.0°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#283F76
RGB	rgb(40, 63, 118)
HSL	hsl(222, 49%, 31%)
HSV	hsv(222, 66%, 46%)
CMYK	cmyk(66.1%, 46.6%, 0%, 53.7%)
CIE-LAB	lab(27.61, 10.24, -34.27)
CIE-LCH	lch(27.61, 35.77, 286.64°)
OKLab	oklab(37.95% -0.0085 -0.0978)
OKLCH	oklch(37.95% 0.098 265)
XYZ	xyz(5.9215, 5.3136, 17.8496)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F76 #765F28

analogous

#286676 #283F76 #382876

triadic

#283F76 #76283F #3F7628

tetradic

#283F76 #762866 #765F28 #287638

square

#283F76 #762866 #765F28 #287638

split-complementary

#283F76 #763828 #667628

monochromatic

#090E1B #192748 #283F76 #3757A4 #5475C5

Accessibility & contrast

On white

10.18

#283F76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#283F76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F76

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F76	#FFFFFF	#000000	##FFFFFF
##283F76	1.00	10.18	2.06	10.18
#FFFFFF	10.18	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254578

Deuteranopia (green-blind)

#183E75

Tritanopia (blue-blind)

#004C54

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f76;
/* rgb */ color: rgb(40, 63, 118);
/* oklch */ color: oklch(37.9% 0.098 265.0);

Tailwind

colors: {
  custom: {
    50: '#6b739e',
    500: '#283f76',
    950: '#000000',
  },
}

SCSS

$custom: #283f76;
$custom-light: #6b739e;
$custom-dark: #000000;

JSON

{
  "hex": "#283f76",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 118
  },
  "hsl": {
    "h": 222.308,
    "s": 49.367,
    "l": 30.98
  },
  "oklch": {
    "l": 0.37947,
    "c": 0.09821,
    "h": 265
  },
  "luminance": 0.05314
}

Semantic roles & 50–950 ramp

primary

#283F76

secondary

#A88F52

accent

#B04FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F76

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

Preview Lab → · Contrast checker → · Palette generator →