#283A79#283A79

#283A79 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.110 H 268.6°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#283A79
RGB	rgb(40, 58, 121)
HSL	hsl(227, 50%, 32%)
HSV	hsv(227, 67%, 47%)
CMYK	cmyk(66.9%, 52.1%, 0%, 52.5%)
CIE-LAB	lab(26.32, 14.85, -38.23)
CIE-LCH	lch(26.32, 41.01, 291.23°)
OKLab	oklab(37.03% -0.0027 -0.1096)
OKLCH	oklch(37.03% 0.11 268.6)
XYZ	xyz(5.8381, 4.8572, 18.7153)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A79 #796728

analogous

#286379 #283A79 #3F2879

triadic

#283A79 #79283A #3A7928

tetradic

#283A79 #792863 #796728 #28793F

square

#283A79 #792863 #796728 #28793F

split-complementary

#283A79 #793F28 #637928

monochromatic

#0A0E1D #19244B #283A79 #3750A7 #556EC7

Accessibility & contrast

On white

10.65

#283A79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283A79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A79

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A79	#FFFFFF	#000000	##FFFFFF
##283A79	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17427B

Deuteranopia (green-blind)

#023B78

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283a79;
/* rgb */ color: rgb(40, 58, 121);
/* oklch */ color: oklch(37.0% 0.110 268.6);

Tailwind

colors: {
  custom: {
    50: '#6b6fa0',
    500: '#283a79',
    950: '#000000',
  },
}

SCSS

$custom: #283a79;
$custom-light: #6b6fa0;
$custom-dark: #000000;

JSON

{
  "hex": "#283a79",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 121
  },
  "hsl": {
    "h": 226.667,
    "s": 50.311,
    "l": 31.569
  },
  "oklch": {
    "l": 0.3703,
    "c": 0.10959,
    "h": 268.6
  },
  "luminance": 0.04858
}

Semantic roles & 50–950 ramp

primary

#283A79

secondary

#AB9752

accent

#BB4EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283A79

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

Preview Lab → · Contrast checker → · Palette generator →