#283A74#283A74

#283A74 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.7% C 0.102 H 268.1°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#283A74
RGB	rgb(40, 58, 116)
HSL	hsl(226, 49%, 31%)
HSV	hsv(226, 66%, 45%)
CMYK	cmyk(65.5%, 50%, 0%, 54.5%)
CIE-LAB	lab(25.97, 12.93, -35.62)
CIE-LCH	lch(25.97, 37.90, 289.95°)
OKLab	oklab(36.65% -0.0033 -0.1019)
OKLCH	oklch(36.65% 0.102 268.1)
XYZ	xyz(5.5394, 4.7377, 17.1422)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A74 #746228

analogous

#286074 #283A74 #3C2874

triadic

#283A74 #74283A #3A7428

tetradic

#283A74 #742860 #746228 #28743C

square

#283A74 #742860 #746228 #28743C

split-complementary

#283A74 #743C28 #607428

monochromatic

#090C19 #182346 #283A74 #3851A2 #536EC4

Accessibility & contrast

On white

10.78

#283A74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283A74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A74

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A74	#FFFFFF	#000000	##FFFFFF
##283A74	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4176

Deuteranopia (green-blind)

#0E3A73

Tritanopia (blue-blind)

#004751

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283a74;
/* rgb */ color: rgb(40, 58, 116);
/* oklch */ color: oklch(36.7% 0.102 268.1);

Tailwind

colors: {
  custom: {
    50: '#6a6f9c',
    500: '#283a74',
    950: '#000000',
  },
}

SCSS

$custom: #283a74;
$custom-light: #6a6f9c;
$custom-dark: #000000;

JSON

{
  "hex": "#283a74",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 116
  },
  "hsl": {
    "h": 225.789,
    "s": 48.718,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36652,
    "c": 0.10196,
    "h": 268.1
  },
  "luminance": 0.04738
}

Semantic roles & 50–950 ramp

primary

#283A74

secondary

#A69252

accent

#B850D8

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283A74

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

Preview Lab → · Contrast checker → · Palette generator →