#537BB3#537BB3

#537BB3 is a mid, moderate blue. Relative luminance 0.193; OKLCH L 57.8% C 0.098 H 256.9°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#537BB3
RGB	rgb(83, 123, 179)
HSL	hsl(215, 39%, 51%)
HSV	hsv(215, 54%, 70%)
CMYK	cmyk(53.6%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(50.99, 2.50, -33.88)
CIE-LCH	lch(50.99, 33.97, 274.22°)
OKLab	oklab(57.79% -0.0221 -0.0953)
OKLCH	oklch(57.79% 0.098 256.9)
XYZ	xyz(18.7841, 19.2581, 45.3664)
Luminance	0.1926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537BB3 #B38B53

analogous

#53ABB3 #537BB3 #5B53B3

triadic

#537BB3 #B3537B #7BB353

tetradic

#537BB3 #B353AB #B38B53 #53B35B

square

#537BB3 #B353AB #B38B53 #53B35B

split-complementary

#537BB3 #B35B53 #ABB353

monochromatic

#2B4161 #3E5E8B #537BB3 #7D9CC6 #A8BCD9

Accessibility & contrast

On white

4.33

#537BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#537BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537BB3

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537BB3	#FFFFFF	#000000	##000000
##537BB3	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657EB5

Deuteranopia (green-blind)

#5975B2

Tritanopia (blue-blind)

#1E878F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #537bb3;
/* rgb */ color: rgb(83, 123, 179);
/* oklch */ color: oklch(57.8% 0.098 256.9);

Tailwind

colors: {
  custom: {
    50: '#8aa0ca',
    500: '#537bb3',
    950: '#000000',
  },
}

SCSS

$custom: #537bb3;
$custom-light: #8aa0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#537bb3",
  "rgb": {
    "r": 83,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 215,
    "s": 38.71,
    "l": 51.373
  },
  "oklch": {
    "l": 0.57791,
    "c": 0.09785,
    "h": 256.9
  },
  "luminance": 0.1926
}

Semantic roles & 50–950 ramp

primary

#537BB3

secondary

#C6B49C

accent

#9E59CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #537BB3

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

Preview Lab → · Contrast checker → · Palette generator →