#283AA3#283AA3

#283AA3 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.170 H 269.5°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#283AA3
RGB	rgb(40, 58, 163)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 75%, 64%)
CMYK	cmyk(75.5%, 64.4%, 0%, 36.1%)
CIE-LAB	lab(29.71, 30.82, -58.64)
CIE-LCH	lch(29.71, 66.25, 297.73°)
OKLab	oklab(40.63% -0.0014 -0.1695)
OKLCH	oklch(40.63% 0.17 269.5)
XYZ	xyz(8.9967, 6.1206, 35.3505)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283AA3 #A39128

analogous

#2877A3 #283AA3 #5428A3

triadic

#283AA3 #A3283A #3AA328

tetradic

#283AA3 #A32877 #A39128 #28A354

square

#283AA3 #A32877 #A39128 #28A354

split-complementary

#283AA3 #A35428 #77A328

monochromatic

#101741 #1C2972 #283AA3 #3A4FCF #6B7BDB

Accessibility & contrast

On white

9.44

#283AA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#283AA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283AA3

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283AA3	#FFFFFF	#000000	##FFFFFF
##283AA3	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA6

Deuteranopia (green-blind)

#0040A1

Tritanopia (blue-blind)

#005569

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283aa3;
/* rgb */ color: rgb(40, 58, 163);
/* oklch */ color: oklch(40.6% 0.170 269.5);

Tailwind

colors: {
  custom: {
    50: '#7570bf',
    500: '#283aa3',
    950: '#000000',
  },
}

SCSS

$custom: #283aa3;
$custom-light: #7570bf;
$custom-dark: #000000;

JSON

{
  "hex": "#283aa3",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 163
  },
  "hsl": {
    "h": 231.22,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40625,
    "c": 0.16954,
    "h": 269.5
  },
  "luminance": 0.06122
}

Semantic roles & 50–950 ramp

primary

#283AA3

secondary

#C1B466

accent

#CC44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283AA3

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

Preview Lab → · Contrast checker → · Palette generator →