#283AA1#283AA1

#283AA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.167 H 269.5°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#283AA1
RGB	rgb(40, 58, 161)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 63%)
CMYK	cmyk(75.2%, 64%, 0%, 36.9%)
CIE-LAB	lab(29.54, 30.08, -57.72)
CIE-LCH	lch(29.54, 65.09, 297.52°)
OKLab	oklab(40.44% -0.0014 -0.1668)
OKLCH	oklch(40.44% 0.167 269.5)
XYZ	xyz(8.8189, 6.0495, 34.4142)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283AA1 #A18F28

analogous

#2877A1 #283AA1 #5228A1

triadic

#283AA1 #A1283A #3AA128

tetradic

#283AA1 #A12877 #A18F28 #28A152

square

#283AA1 #A12877 #A18F28 #28A152

split-complementary

#283AA1 #A15228 #77A128

monochromatic

#10173F #1C2870 #283AA1 #394FCE #6A7ADA

Accessibility & contrast

On white

9.50

#283AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#283AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283AA1

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283AA1	#FFFFFF	#000000	##FFFFFF
##283AA1	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#00409F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283aa1;
/* rgb */ color: rgb(40, 58, 161);
/* oklch */ color: oklch(40.4% 0.167 269.5);

Tailwind

colors: {
  custom: {
    50: '#7570be',
    500: '#283aa1',
    950: '#000000',
  },
}

SCSS

$custom: #283aa1;
$custom-light: #7570be;
$custom-dark: #000000;

JSON

{
  "hex": "#283aa1",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 161
  },
  "hsl": {
    "h": 231.074,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.4044,
    "c": 0.16685,
    "h": 269.5
  },
  "luminance": 0.0605
}

Semantic roles & 50–950 ramp

primary

#283AA1

secondary

#C0B365

accent

#CC44E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283AA1

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

Preview Lab → · Contrast checker → · Palette generator →