#283BA4#283BA4

#283BA4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.9% C 0.170 H 269.3°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#283BA4
RGB	rgb(40, 59, 164)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 76%, 64%)
CMYK	cmyk(75.6%, 64%, 0%, 35.7%)
CIE-LAB	lab(30.06, 30.54, -58.69)
CIE-LCH	lch(30.06, 66.16, 297.49°)
OKLab	oklab(40.9% -0.0021 -0.1697)
OKLCH	oklch(40.9% 0.17 269.3)
XYZ	xyz(9.1376, 6.2584, 35.8412)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA4 #A49128

analogous

#2879A4 #283BA4 #5328A4

triadic

#283BA4 #A4283B #3BA428

tetradic

#283BA4 #A42879 #A49128 #28A453

square

#283BA4 #A42879 #A49128 #28A453

split-complementary

#283BA4 #A45328 #79A428

monochromatic

#101842 #1C2973 #283BA4 #3A51CF #6B7DDB

Accessibility & contrast

On white

9.33

#283BA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#283BA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA4

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA4	#FFFFFF	#000000	##FFFFFF
##283BA4	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA7

Deuteranopia (green-blind)

#0041A2

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ba4;
/* rgb */ color: rgb(40, 59, 164);
/* oklch */ color: oklch(40.9% 0.170 269.3);

Tailwind

colors: {
  custom: {
    50: '#7571c0',
    500: '#283ba4',
    950: '#000000',
  },
}

SCSS

$custom: #283ba4;
$custom-light: #7571c0;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba4",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 164
  },
  "hsl": {
    "h": 230.806,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.40903,
    "c": 0.16967,
    "h": 269.3
  },
  "luminance": 0.06259
}

Semantic roles & 50–950 ramp

primary

#283BA4

secondary

#C1B466

accent

#CB44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283BA4

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

Preview Lab → · Contrast checker → · Palette generator →