#537BBB#537BBB

#537BBB is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.2% C 0.109 H 259.5°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#537BBB
RGB	rgb(83, 123, 187)
HSL	hsl(217, 43%, 53%)
HSV	hsv(217, 56%, 73%)
CMYK	cmyk(55.6%, 34.2%, 0%, 26.7%)
CIE-LAB	lab(51.37, 5.09, -37.89)
CIE-LCH	lch(51.37, 38.23, 277.65°)
OKLab	oklab(58.22% -0.0199 -0.107)
OKLCH	oklch(58.22% 0.109 259.5)
XYZ	xyz(19.6168, 19.5912, 49.7518)
Luminance	0.1959 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537BBB #BB9353

analogous

#53AFBB #537BBB #5F53BB

triadic

#537BBB #BB537B #7BBB53

tetradic

#537BBB #BB53AF #BB9353 #53BB5F

square

#537BBB #BB53AF #BB9353 #53BB5F

split-complementary

#537BBB #BB5F53 #AFBB53

monochromatic

#2A426A #3B5E96 #537BBB #7F9DCC #ABBEDE

Accessibility & contrast

On white

4.27

#537BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#537BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537BBB

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537BBB	#FFFFFF	#000000	##000000
##537BBB	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6180BE

Deuteranopia (green-blind)

#5476BA

Tritanopia (blue-blind)

#0E8992

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #537bbb;
/* rgb */ color: rgb(83, 123, 187);
/* oklch */ color: oklch(58.2% 0.109 259.5);

Tailwind

colors: {
  custom: {
    50: '#8ba0d0',
    500: '#537bbb',
    950: '#000000',
  },
}

SCSS

$custom: #537bbb;
$custom-light: #8ba0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#537bbb",
  "rgb": {
    "r": 83,
    "g": 123,
    "b": 187
  },
  "hsl": {
    "h": 216.923,
    "s": 43.333,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58216,
    "c": 0.1088,
    "h": 259.5
  },
  "luminance": 0.19593
}

Semantic roles & 50–950 ramp

primary

#537BBB

secondary

#CBBA9E

accent

#A255D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #537BBB

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

Preview Lab → · Contrast checker → · Palette generator →