#537BB5#537BB5

#537BB5 is a mid, moderate blue. Relative luminance 0.193; OKLCH L 57.9% C 0.101 H 257.6°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#537BB5
RGB	rgb(83, 123, 181)
HSL	hsl(216, 40%, 52%)
HSV	hsv(216, 54%, 71%)
CMYK	cmyk(54.1%, 32%, 0%, 29%)
CIE-LAB	lab(51.08, 3.14, -34.89)
CIE-LCH	lch(51.08, 35.03, 275.15°)
OKLab	oklab(57.9% -0.0215 -0.0982)
OKLCH	oklch(57.9% 0.101 257.6)
XYZ	xyz(18.9879, 19.3396, 46.4394)
Luminance	0.1934 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537BB5 #B58D53

analogous

#53ACB5 #537BB5 #5C53B5

triadic

#537BB5 #B5537B #7BB553

tetradic

#537BB5 #B553AC #B58D53 #53B55C

square

#537BB5 #B553AC #B58D53 #53B55C

split-complementary

#537BB5 #B55C53 #ACB553

monochromatic

#2B4263 #3D5E8E #537BB5 #7E9CC7 #A9BDDA

Accessibility & contrast

On white

4.31

#537BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#537BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537BB5

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537BB5	#FFFFFF	#000000	##000000
##537BB5	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647FB7

Deuteranopia (green-blind)

#5875B4

Tritanopia (blue-blind)

#1B8890

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #537bb5;
/* rgb */ color: rgb(83, 123, 181);
/* oklch */ color: oklch(57.9% 0.101 257.6);

Tailwind

colors: {
  custom: {
    50: '#8aa0cb',
    500: '#537bb5',
    950: '#000000',
  },
}

SCSS

$custom: #537bb5;
$custom-light: #8aa0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#537bb5",
  "rgb": {
    "r": 83,
    "g": 123,
    "b": 181
  },
  "hsl": {
    "h": 215.51,
    "s": 39.837,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57895,
    "c": 0.10058,
    "h": 257.6
  },
  "luminance": 0.19341
}

Semantic roles & 50–950 ramp

primary

#537BB5

secondary

#C7B69C

accent

#9F58D0

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #537BB5

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

Preview Lab → · Contrast checker → · Palette generator →