#283BA1#283BA1

#283BA1 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.166 H 269.3°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#283BA1
RGB	rgb(40, 59, 161)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 63%)
CMYK	cmyk(75.2%, 63.4%, 0%, 36.9%)
CIE-LAB	lab(29.79, 29.42, -57.31)
CIE-LCH	lch(29.79, 64.42, 297.17°)
OKLab	oklab(40.63% -0.002 -0.1656)
OKLCH	oklch(40.63% 0.166 269.3)
XYZ	xyz(8.8698, 6.1513, 34.4312)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA1 #A18E28

analogous

#2877A1 #283BA1 #5228A1

triadic

#283BA1 #A1283B #3BA128

tetradic

#283BA1 #A12877 #A18E28 #28A152

square

#283BA1 #A12877 #A18E28 #28A152

split-complementary

#283BA1 #A15228 #77A128

monochromatic

#10173F #1C2970 #283BA1 #3950CE #6A7BDA

Accessibility & contrast

On white

9.42

#283BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#283BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA1

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA1	#FFFFFF	#000000	##FFFFFF
##283BA1	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283ba1;
/* rgb */ color: rgb(40, 59, 161);
/* oklch */ color: oklch(40.6% 0.166 269.3);

Tailwind

colors: {
  custom: {
    50: '#7570be',
    500: '#283ba1',
    950: '#000000',
  },
}

SCSS

$custom: #283ba1;
$custom-light: #7570be;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba1",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 161
  },
  "hsl": {
    "h": 230.579,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40627,
    "c": 0.16562,
    "h": 269.3
  },
  "luminance": 0.06152
}

Semantic roles & 50–950 ramp

primary

#283BA1

secondary

#C0B265

accent

#CA44E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283BA1

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

Preview Lab → · Contrast checker → · Palette generator →