#283F77#283F77

#283F77 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.0% C 0.100 H 265.2°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#283F77
RGB	rgb(40, 63, 119)
HSL	hsl(223, 50%, 31%)
HSV	hsv(223, 66%, 47%)
CMYK	cmyk(66.4%, 47.1%, 0%, 53.3%)
CIE-LAB	lab(27.68, 10.62, -34.80)
CIE-LCH	lch(27.68, 36.38, 286.98°)
OKLab	oklab(38.02% -0.0084 -0.0994)
OKLCH	oklch(38.02% 0.1 265.2)
XYZ	xyz(5.9812, 5.3375, 18.1642)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F77 #776028

analogous

#286677 #283F77 #382877

triadic

#283F77 #77283F #3F7728

tetradic

#283F77 #772866 #776028 #287738

square

#283F77 #772866 #776028 #287738

split-complementary

#283F77 #773828 #667728

monochromatic

#090F1B #192749 #283F77 #3757A5 #5475C5

Accessibility & contrast

On white

10.16

#283F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F77

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F77	#FFFFFF	#000000	##FFFFFF
##283F77	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244579

Deuteranopia (green-blind)

#173E76

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f77;
/* rgb */ color: rgb(40, 63, 119);
/* oklch */ color: oklch(38.0% 0.100 265.2);

Tailwind

colors: {
  custom: {
    50: '#6b739e',
    500: '#283f77',
    950: '#000000',
  },
}

SCSS

$custom: #283f77;
$custom-light: #6b739e;
$custom-dark: #000000;

JSON

{
  "hex": "#283f77",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 119
  },
  "hsl": {
    "h": 222.532,
    "s": 49.686,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38018,
    "c": 0.09974,
    "h": 265.2
  },
  "luminance": 0.05338
}

Semantic roles & 50–950 ramp

primary

#283F77

secondary

#A99052

accent

#B14FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F77

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

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