#537BB9#537BB9

#537BB9 is a mid, moderate blue. Relative luminance 0.195; OKLCH L 58.1% C 0.106 H 258.9°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#537BB9
RGB	rgb(83, 123, 185)
HSL	hsl(216, 42%, 53%)
HSV	hsv(216, 55%, 73%)
CMYK	cmyk(55.1%, 33.5%, 0%, 27.5%)
CIE-LAB	lab(51.27, 4.44, -36.89)
CIE-LCH	lch(51.27, 37.16, 276.86°)
OKLab	oklab(58.11% -0.0204 -0.1041)
OKLCH	oklch(58.11% 0.106 258.9)
XYZ	xyz(19.4042, 19.5062, 48.6321)
Luminance	0.1951 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537BB9 #B99153

analogous

#53AEB9 #537BB9 #5E53B9

triadic

#537BB9 #B9537B #7BB953

tetradic

#537BB9 #B953AE #B99153 #53B95E

square

#537BB9 #B953AE #B99153 #53B95E

split-complementary

#537BB9 #B95E53 #AEB953

monochromatic

#2A4267 #3C5E93 #537BB9 #7E9CCB #AABEDC

Accessibility & contrast

On white

4.28

#537BB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#537BB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537BB9

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537BB9	#FFFFFF	#000000	##000000
##537BB9	1.00	4.28	4.90	4.90
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627FBC

Deuteranopia (green-blind)

#5576B8

Tritanopia (blue-blind)

#138991

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #537bb9;
/* rgb */ color: rgb(83, 123, 185);
/* oklch */ color: oklch(58.1% 0.106 258.9);

Tailwind

colors: {
  custom: {
    50: '#8aa0ce',
    500: '#537bb9',
    950: '#000000',
  },
}

SCSS

$custom: #537bb9;
$custom-light: #8aa0ce;
$custom-dark: #000000;

JSON

{
  "hex": "#537bb9",
  "rgb": {
    "r": 83,
    "g": 123,
    "b": 185
  },
  "hsl": {
    "h": 216.471,
    "s": 42.149,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58108,
    "c": 0.10605,
    "h": 258.9
  },
  "luminance": 0.19508
}

Semantic roles & 50–950 ramp

primary

#537BB9

secondary

#CAB99E

accent

#A156D2

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #537BB9

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

Preview Lab → · Contrast checker → · Palette generator →