#283BB0#283BB0

#283BB0 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.186 H 269.2°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#283BB0
RGB	rgb(40, 59, 176)
HSL	hsl(232, 63%, 42%)
HSV	hsv(232, 77%, 69%)
CMYK	cmyk(77.3%, 66.5%, 0%, 31%)
CIE-LAB	lab(31.14, 34.97, -64.10)
CIE-LCH	lch(31.14, 73.02, 298.61°)
OKLab	oklab(42.04% -0.0027 -0.1855)
OKLCH	oklch(42.04% 0.186 269.2)
XYZ	xyz(10.2728, 6.7125, 41.8201)
Luminance	0.0671 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BB0 #B09D28

analogous

#287FB0 #283BB0 #5928B0

triadic

#283BB0 #B0283B #3BB028

tetradic

#283BB0 #B0287F #B09D28 #28B059

square

#283BB0 #B0287F #B09D28 #28B059

split-complementary

#283BB0 #B05928 #7FB028

monochromatic

#111A4C #1D2A7E #283BB0 #4156D4 #7382DF

Accessibility & contrast

On white

8.96

#283BB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#283BB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BB0

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BB0	#FFFFFF	#000000	##FFFFFF
##283BB0	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283bb0;
/* rgb */ color: rgb(40, 59, 176);
/* oklch */ color: oklch(42.0% 0.186 269.2);

Tailwind

colors: {
  custom: {
    50: '#7871c9',
    500: '#283bb0',
    950: '#000000',
  },
}

SCSS

$custom: #283bb0;
$custom-light: #7871c9;
$custom-dark: #000000;

JSON

{
  "hex": "#283bb0",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 176
  },
  "hsl": {
    "h": 231.618,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42035,
    "c": 0.18551,
    "h": 269.2
  },
  "luminance": 0.06714
}

Semantic roles & 50–950 ramp

primary

#283BB0

secondary

#C6BA6D

accent

#CF42E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283BB0

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

Preview Lab → · Contrast checker → · Palette generator →