#283DA3#283DA3

#283DA3 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.166 H 268.8°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#283DA3
RGB	rgb(40, 61, 163)
HSL	hsl(230, 61%, 40%)
HSV	hsv(230, 75%, 64%)
CMYK	cmyk(75.5%, 62.6%, 0%, 36.1%)
CIE-LAB	lab(30.48, 28.84, -57.39)
CIE-LCH	lch(30.48, 64.23, 296.68°)
OKLab	oklab(41.19% -0.0034 -0.1658)
OKLCH	oklch(41.19% 0.166 268.8)
XYZ	xyz(9.1524, 6.4320, 35.4024)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA3 #A38E28

analogous

#287BA3 #283DA3 #5128A3

triadic

#283DA3 #A3283D #3DA328

tetradic

#283DA3 #A3287B #A38E28 #28A351

square

#283DA3 #A3287B #A38E28 #28A351

split-complementary

#283DA3 #A35128 #7BA328

monochromatic

#101841 #1C2B72 #283DA3 #3A53CF #6B7EDB

Accessibility & contrast

On white

9.18

#283DA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#283DA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA3

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA3	#FFFFFF	#000000	##FFFFFF
##283DA3	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA6

Deuteranopia (green-blind)

#0042A1

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283da3;
/* rgb */ color: rgb(40, 61, 163);
/* oklch */ color: oklch(41.2% 0.166 268.8);

Tailwind

colors: {
  custom: {
    50: '#7572bf',
    500: '#283da3',
    950: '#000000',
  },
}

SCSS

$custom: #283da3;
$custom-light: #7572bf;
$custom-dark: #000000;

JSON

{
  "hex": "#283da3",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 163
  },
  "hsl": {
    "h": 229.756,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41188,
    "c": 0.16589,
    "h": 268.8
  },
  "luminance": 0.06433
}

Semantic roles & 50–950 ramp

primary

#283DA3

secondary

#C1B166

accent

#C844E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283DA3

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

Preview Lab → · Contrast checker → · Palette generator →