#283CA3#283CA3

#283CA3 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.0% C 0.167 H 269.1°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#283CA3
RGB	rgb(40, 60, 163)
HSL	hsl(230, 61%, 40%)
HSV	hsv(230, 75%, 64%)
CMYK	cmyk(75.5%, 63.2%, 0%, 36.1%)
CIE-LAB	lab(30.22, 29.51, -57.81)
CIE-LCH	lch(30.22, 64.91, 297.04°)
OKLab	oklab(41% -0.0028 -0.1671)
OKLCH	oklch(41% 0.167 269.1)
XYZ	xyz(9.0995, 6.3262, 35.3847)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CA3 #A38F28

analogous

#2879A3 #283CA3 #5228A3

triadic

#283CA3 #A3283C #3CA328

tetradic

#283CA3 #A32879 #A38F28 #28A352

square

#283CA3 #A32879 #A38F28 #28A352

split-complementary

#283CA3 #A35228 #79A328

monochromatic

#101841 #1C2A72 #283CA3 #3A52CF #6B7DDB

Accessibility & contrast

On white

9.27

#283CA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#283CA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CA3

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CA3	#FFFFFF	#000000	##FFFFFF
##283CA3	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA6

Deuteranopia (green-blind)

#0042A1

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ca3;
/* rgb */ color: rgb(40, 60, 163);
/* oklch */ color: oklch(41.0% 0.167 269.1);

Tailwind

colors: {
  custom: {
    50: '#7571bf',
    500: '#283ca3',
    950: '#000000',
  },
}

SCSS

$custom: #283ca3;
$custom-light: #7571bf;
$custom-dark: #000000;

JSON

{
  "hex": "#283ca3",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 163
  },
  "hsl": {
    "h": 230.244,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40998,
    "c": 0.1671,
    "h": 269.1
  },
  "luminance": 0.06327
}

Semantic roles & 50–950 ramp

primary

#283CA3

secondary

#C1B266

accent

#CA44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283CA3

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

Preview Lab → · Contrast checker → · Palette generator →