#283DA4#283DA4

#283DA4 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.3% C 0.167 H 268.8°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#283DA4
RGB	rgb(40, 61, 164)
HSL	hsl(230, 61%, 40%)
HSV	hsv(230, 76%, 64%)
CMYK	cmyk(75.6%, 62.8%, 0%, 35.7%)
CIE-LAB	lab(30.56, 29.22, -57.86)
CIE-LCH	lch(30.56, 64.82, 296.80°)
OKLab	oklab(41.28% -0.0035 -0.1672)
OKLCH	oklch(41.28% 0.167 268.8)
XYZ	xyz(9.2423, 6.4679, 35.8761)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA4 #A48F28

analogous

#287BA4 #283DA4 #5128A4

triadic

#283DA4 #A4283D #3DA428

tetradic

#283DA4 #A4287B #A48F28 #28A451

square

#283DA4 #A4287B #A48F28 #28A451

split-complementary

#283DA4 #A45128 #7BA428

monochromatic

#101842 #1C2B73 #283DA4 #3A53CF #6B7EDB

Accessibility & contrast

On white

9.16

#283DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#283DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA4

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA4	#FFFFFF	#000000	##FFFFFF
##283DA4	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0042A2

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283da4;
/* rgb */ color: rgb(40, 61, 164);
/* oklch */ color: oklch(41.3% 0.167 268.8);

Tailwind

colors: {
  custom: {
    50: '#7572c0',
    500: '#283da4',
    950: '#000000',
  },
}

SCSS

$custom: #283da4;
$custom-light: #7572c0;
$custom-dark: #000000;

JSON

{
  "hex": "#283da4",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 164
  },
  "hsl": {
    "h": 229.839,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.41278,
    "c": 0.16724,
    "h": 268.8
  },
  "luminance": 0.06469
}

Semantic roles & 50–950 ramp

primary

#283DA4

secondary

#C1B266

accent

#C944E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283DA4

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

Preview Lab → · Contrast checker → · Palette generator →