#283BAB#283BAB

#283BAB is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.6% C 0.179 H 269.2°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#283BAB
RGB	rgb(40, 59, 171)
HSL	hsl(231, 62%, 41%)
HSV	hsv(231, 77%, 67%)
CMYK	cmyk(76.6%, 65.5%, 0%, 32.9%)
CIE-LAB	lab(30.68, 33.13, -61.86)
CIE-LCH	lch(30.68, 70.18, 298.17°)
OKLab	oklab(41.56% -0.0024 -0.179)
OKLCH	oklch(41.56% 0.179 269.2)
XYZ	xyz(9.7872, 6.5182, 39.2625)
Luminance	0.0652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BAB #AB9828

analogous

#287DAB #283BAB #5728AB

triadic

#283BAB #AB283B #3BAB28

tetradic

#283BAB #AB287D #AB9828 #28AB57

square

#283BAB #AB287D #AB9828 #28AB57

split-complementary

#283BAB #AB5728 #7DAB28

monochromatic

#111948 #1C2A79 #283BAB #3E54D2 #7080DE

Accessibility & contrast

On white

9.12

#283BAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#283BAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BAB

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BAB	#FFFFFF	#000000	##FFFFFF
##283BAB	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAF

Deuteranopia (green-blind)

#0042A9

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283bab;
/* rgb */ color: rgb(40, 59, 171);
/* oklch */ color: oklch(41.6% 0.179 269.2);

Tailwind

colors: {
  custom: {
    50: '#7771c5',
    500: '#283bab',
    950: '#000000',
  },
}

SCSS

$custom: #283bab;
$custom-light: #7771c5;
$custom-dark: #000000;

JSON

{
  "hex": "#283bab",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 171
  },
  "hsl": {
    "h": 231.298,
    "s": 62.085,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41559,
    "c": 0.17898,
    "h": 269.2
  },
  "luminance": 0.06519
}

Semantic roles & 50–950 ramp

primary

#283BAB

secondary

#C4B76A

accent

#CE43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283BAB

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

Preview Lab → · Contrast checker → · Palette generator →