#5371BB#5371BB

#5371BB is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.0% C 0.120 H 266.0°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#5371BB
RGB	rgb(83, 113, 187)
HSL	hsl(223, 43%, 53%)
HSV	hsv(223, 56%, 73%)
CMYK	cmyk(55.6%, 39.6%, 0%, 26.7%)
CIE-LAB	lab(48.56, 11.19, -42.34)
CIE-LCH	lch(48.56, 43.79, 284.81°)
OKLab	oklab(56.03% -0.0084 -0.12)
OKLCH	oklch(56.03% 0.12 266)
XYZ	xyz(18.4390, 17.2357, 49.3592)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5371BB #BB9D53

analogous

#53A5BB #5371BB #6953BB

triadic

#5371BB #BB5371 #71BB53

tetradic

#5371BB #BB53A5 #BB9D53 #53BB69

square

#5371BB #BB53A5 #BB9D53 #53BB69

split-complementary

#5371BB #BB6953 #A5BB53

monochromatic

#2A3C6A #3B5596 #5371BB #7F95CC #ABB9DE

Accessibility & contrast

On white

4.72

#5371BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#5371BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5371BB

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5371BB	#FFFFFF	#000000	##FFFFFF
##5371BB	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BE

Deuteranopia (green-blind)

#466FB9

Tritanopia (blue-blind)

#14818D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #5371bb;
/* rgb */ color: rgb(83, 113, 187);
/* oklch */ color: oklch(56.0% 0.120 266.0);

Tailwind

colors: {
  custom: {
    50: '#8b99d0',
    500: '#5371bb',
    950: '#000000',
  },
}

SCSS

$custom: #5371bb;
$custom-light: #8b99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5371bb",
  "rgb": {
    "r": 83,
    "g": 113,
    "b": 187
  },
  "hsl": {
    "h": 222.692,
    "s": 43.333,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56033,
    "c": 0.12033,
    "h": 266
  },
  "luminance": 0.17237
}

Semantic roles & 50–950 ramp

primary

#5371BB

secondary

#CBBE9E

accent

#AF55D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #5371BB

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

Preview Lab → · Contrast checker → · Palette generator →