#283A75#283A75

#283A75 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.103 H 268.2°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#283A75
RGB	rgb(40, 58, 117)
HSL	hsl(226, 49%, 31%)
HSV	hsv(226, 66%, 46%)
CMYK	cmyk(65.8%, 50.4%, 0%, 54.1%)
CIE-LAB	lab(26.04, 13.32, -36.15)
CIE-LCH	lch(26.04, 38.52, 290.22°)
OKLab	oklab(36.73% -0.0032 -0.1034)
OKLCH	oklch(36.73% 0.103 268.2)
XYZ	xyz(5.5979, 4.7611, 17.4502)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A75 #756328

analogous

#286075 #283A75 #3C2875

triadic

#283A75 #75283A #3A7528

tetradic

#283A75 #752860 #756328 #28753C

square

#283A75 #752860 #756328 #28753C

split-complementary

#283A75 #753C28 #607528

monochromatic

#090D1A #182347 #283A75 #3851A3 #536EC4

Accessibility & contrast

On white

10.76

#283A75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283A75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A75

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A75	#FFFFFF	#000000	##FFFFFF
##283A75	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4177

Deuteranopia (green-blind)

#0C3A74

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283a75;
/* rgb */ color: rgb(40, 58, 117);
/* oklch */ color: oklch(36.7% 0.103 268.2);

Tailwind

colors: {
  custom: {
    50: '#6b6f9d',
    500: '#283a75',
    950: '#000000',
  },
}

SCSS

$custom: #283a75;
$custom-light: #6b6f9d;
$custom-dark: #000000;

JSON

{
  "hex": "#283a75",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 117
  },
  "hsl": {
    "h": 225.974,
    "s": 49.045,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36727,
    "c": 0.10349,
    "h": 268.2
  },
  "luminance": 0.04762
}

Semantic roles & 50–950 ramp

primary

#283A75

secondary

#A79352

accent

#B84FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283A75

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

Preview Lab → · Contrast checker → · Palette generator →