#283CA4#283CA4

#283CA4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.168 H 269.1°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#283CA4
RGB	rgb(40, 60, 164)
HSL	hsl(230, 61%, 40%)
HSV	hsv(230, 76%, 64%)
CMYK	cmyk(75.6%, 63.4%, 0%, 35.7%)
CIE-LAB	lab(30.31, 29.88, -58.27)
CIE-LCH	lch(30.31, 65.49, 297.15°)
OKLab	oklab(41.09% -0.0028 -0.1684)
OKLCH	oklch(41.09% 0.168 269.1)
XYZ	xyz(9.1895, 6.3622, 35.8585)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CA4 #A49028

analogous

#287AA4 #283CA4 #5228A4

triadic

#283CA4 #A4283C #3CA428

tetradic

#283CA4 #A4287A #A49028 #28A452

square

#283CA4 #A4287A #A49028 #28A452

split-complementary

#283CA4 #A45228 #7AA428

monochromatic

#101842 #1C2A73 #283CA4 #3A52CF #6B7DDB

Accessibility & contrast

On white

9.24

#283CA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#283CA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CA4

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CA4	#FFFFFF	#000000	##FFFFFF
##283CA4	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA7

Deuteranopia (green-blind)

#0042A2

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ca4;
/* rgb */ color: rgb(40, 60, 164);
/* oklch */ color: oklch(41.1% 0.168 269.1);

Tailwind

colors: {
  custom: {
    50: '#7571c0',
    500: '#283ca4',
    950: '#000000',
  },
}

SCSS

$custom: #283ca4;
$custom-light: #7571c0;
$custom-dark: #000000;

JSON

{
  "hex": "#283ca4",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 164
  },
  "hsl": {
    "h": 230.323,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.4109,
    "c": 0.16845,
    "h": 269.1
  },
  "luminance": 0.06363
}

Semantic roles & 50–950 ramp

primary

#283CA4

secondary

#C1B366

accent

#CA44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283CA4

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

Preview Lab → · Contrast checker → · Palette generator →