#283B74#283B74

#283B74 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.9% C 0.101 H 267.5°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#283B74
RGB	rgb(40, 59, 116)
HSL	hsl(225, 49%, 31%)
HSV	hsv(225, 66%, 45%)
CMYK	cmyk(65.5%, 49.1%, 0%, 54.5%)
CIE-LAB	lab(26.27, 12.24, -35.15)
CIE-LCH	lch(26.27, 37.22, 289.20°)
OKLab	oklab(36.88% -0.0045 -0.1005)
OKLCH	oklch(36.88% 0.101 267.5)
XYZ	xyz(5.5903, 4.8395, 17.1591)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B74 #746128

analogous

#286174 #283B74 #3B2874

triadic

#283B74 #74283B #3B7428

tetradic

#283B74 #742861 #746128 #28743B

square

#283B74 #742861 #746128 #28743B

split-complementary

#283B74 #743B28 #617428

monochromatic

#090D19 #182446 #283B74 #3852A2 #536FC4

Accessibility & contrast

On white

10.67

#283B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B74

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B74	#FFFFFF	#000000	##FFFFFF
##283B74	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4276

Deuteranopia (green-blind)

#113B73

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b74;
/* rgb */ color: rgb(40, 59, 116);
/* oklch */ color: oklch(36.9% 0.101 267.5);

Tailwind

colors: {
  custom: {
    50: '#6a709c',
    500: '#283b74',
    950: '#000000',
  },
}

SCSS

$custom: #283b74;
$custom-light: #6a709c;
$custom-dark: #000000;

JSON

{
  "hex": "#283b74",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 116
  },
  "hsl": {
    "h": 225,
    "s": 48.718,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3688,
    "c": 0.10057,
    "h": 267.5
  },
  "luminance": 0.0484
}

Semantic roles & 50–950 ramp

primary

#283B74

secondary

#A69152

accent

#B650D8

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B74

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

Preview Lab → · Contrast checker → · Palette generator →