#5370BB#5370BB

#5370BB is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.122 H 266.6°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#5370BB
RGB	rgb(83, 112, 187)
HSL	hsl(223, 43%, 53%)
HSV	hsv(223, 56%, 73%)
CMYK	cmyk(55.6%, 40.1%, 0%, 26.7%)
CIE-LAB	lab(48.28, 11.81, -42.78)
CIE-LCH	lch(48.28, 44.38, 285.43°)
OKLab	oklab(55.82% -0.0073 -0.1213)
OKLCH	oklch(55.82% 0.122 266.6)
XYZ	xyz(18.3281, 17.0138, 49.3222)
Luminance	0.1701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5370BB #BB9E53

analogous

#53A4BB #5370BB #6A53BB

triadic

#5370BB #BB5370 #70BB53

tetradic

#5370BB #BB53A4 #BB9E53 #53BB6A

square

#5370BB #BB53A4 #BB9E53 #53BB6A

split-complementary

#5370BB #BB6A53 #A4BB53

monochromatic

#2A3C6A #3B5496 #5370BB #7F94CC #ABB9DE

Accessibility & contrast

On white

4.77

#5370BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#5370BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5370BB

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5370BB	#FFFFFF	#000000	##FFFFFF
##5370BB	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5178BE

Deuteranopia (green-blind)

#446EB9

Tritanopia (blue-blind)

#15808C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5370bb;
/* rgb */ color: rgb(83, 112, 187);
/* oklch */ color: oklch(55.8% 0.122 266.6);

Tailwind

colors: {
  custom: {
    50: '#8b98d0',
    500: '#5370bb',
    950: '#000000',
  },
}

SCSS

$custom: #5370bb;
$custom-light: #8b98d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5370bb",
  "rgb": {
    "r": 83,
    "g": 112,
    "b": 187
  },
  "hsl": {
    "h": 223.269,
    "s": 43.333,
    "l": 52.941
  },
  "oklch": {
    "l": 0.55818,
    "c": 0.12155,
    "h": 266.6
  },
  "luminance": 0.17015
}

Semantic roles & 50–950 ramp

primary

#5370BB

secondary

#CBBF9E

accent

#B055D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #5370BB

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

Preview Lab → · Contrast checker → · Palette generator →