#283AA4#283AA4

#283AA4 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.7% C 0.171 H 269.5°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#283AA4
RGB	rgb(40, 58, 164)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 76%, 64%)
CMYK	cmyk(75.6%, 64.6%, 0%, 35.7%)
CIE-LAB	lab(29.80, 31.19, -59.10)
CIE-LCH	lch(29.80, 66.83, 297.83°)
OKLab	oklab(40.72% -0.0015 -0.1709)
OKLCH	oklch(40.72% 0.171 269.5)
XYZ	xyz(9.0867, 6.1566, 35.8242)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283AA4 #A49228

analogous

#2878A4 #283AA4 #5428A4

triadic

#283AA4 #A4283A #3AA428

tetradic

#283AA4 #A42878 #A49228 #28A454

square

#283AA4 #A42878 #A49228 #28A454

split-complementary

#283AA4 #A45428 #78A428

monochromatic

#101742 #1C2973 #283AA4 #3A50CF #6B7CDB

Accessibility & contrast

On white

9.41

#283AA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#283AA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283AA4

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283AA4	#FFFFFF	#000000	##FFFFFF
##283AA4	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA7

Deuteranopia (green-blind)

#0040A2

Tritanopia (blue-blind)

#005669

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283aa4;
/* rgb */ color: rgb(40, 58, 164);
/* oklch */ color: oklch(40.7% 0.171 269.5);

Tailwind

colors: {
  custom: {
    50: '#7570c0',
    500: '#283aa4',
    950: '#000000',
  },
}

SCSS

$custom: #283aa4;
$custom-light: #7570c0;
$custom-dark: #000000;

JSON

{
  "hex": "#283aa4",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 164
  },
  "hsl": {
    "h": 231.29,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.40719,
    "c": 0.17088,
    "h": 269.5
  },
  "luminance": 0.06158
}

Semantic roles & 50–950 ramp

primary

#283AA4

secondary

#C1B466

accent

#CD44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283AA4

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

Preview Lab → · Contrast checker → · Palette generator →