#283BBB#283BBB

#283BBB is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.200 H 269.0°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#283BBB
RGB	rgb(40, 59, 187)
HSL	hsl(232, 65%, 45%)
HSV	hsv(232, 79%, 73%)
CMYK	cmyk(78.6%, 68.4%, 0%, 26.7%)
CIE-LAB	lab(32.18, 38.94, -68.92)
CIE-LCH	lch(32.18, 79.16, 299.47°)
OKLab	oklab(43.11% -0.0036 -0.1996)
OKLCH	oklch(43.11% 0.2 269)
XYZ	xyz(11.4056, 7.1656, 47.7861)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BBB #BBA828

analogous

#2885BB #283BBB #5F28BB

triadic

#283BBB #BB283B #3BBB28

tetradic

#283BBB #BB2885 #BBA828 #28BB5F

square

#283BBB #BB2885 #BBA828 #28BB5F

split-complementary

#283BBB #BB5F28 #85BB28

monochromatic

#121B56 #1D2B89 #283BBB #485BD8 #7B88E3

Accessibility & contrast

On white

8.63

#283BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#283BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BBB

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BBB	#FFFFFF	#000000	##FFFFFF
##283BBB	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0045B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #283bbb;
/* rgb */ color: rgb(40, 59, 187);
/* oklch */ color: oklch(43.1% 0.200 269.0);

Tailwind

colors: {
  custom: {
    50: '#7b71d1',
    500: '#283bbb',
    950: '#000000',
  },
}

SCSS

$custom: #283bbb;
$custom-light: #7b71d1;
$custom-dark: #000000;

JSON

{
  "hex": "#283bbb",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 187
  },
  "hsl": {
    "h": 232.245,
    "s": 64.758,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43106,
    "c": 0.1996,
    "h": 269
  },
  "luminance": 0.07167
}

Semantic roles & 50–950 ramp

primary

#283BBB

secondary

#CBC074

accent

#D240E8

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0714

muted

#7C7A83

Preview Lab

Preview with #283BBB

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

Preview Lab → · Contrast checker → · Palette generator →