#537DBB#537DBB

#537DBB is a mid, moderate blue. Relative luminance 0.201; OKLCH L 58.7% C 0.107 H 258.0°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#537DBB
RGB	rgb(83, 125, 187)
HSL	hsl(216, 43%, 53%)
HSV	hsv(216, 56%, 73%)
CMYK	cmyk(55.6%, 33.2%, 0%, 26.7%)
CIE-LAB	lab(51.94, 3.88, -36.99)
CIE-LCH	lch(51.94, 37.19, 276.00°)
OKLab	oklab(58.66% -0.0222 -0.1043)
OKLCH	oklch(58.66% 0.107 258)
XYZ	xyz(19.8674, 20.0925, 49.8354)
Luminance	0.2009 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537DBB #BB9153

analogous

#53B1BB #537DBB #5D53BB

triadic

#537DBB #BB537D #7DBB53

tetradic

#537DBB #BB53B1 #BB9153 #53BB5D

square

#537DBB #BB53B1 #BB9153 #53BB5D

split-complementary

#537DBB #BB5D53 #B1BB53

monochromatic

#2A446A #3B6096 #537DBB #7F9ECC #ABBFDE

Accessibility & contrast

On white

4.18

#537DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.02

#537DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537DBB

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537DBB	#FFFFFF	#000000	##000000
##537DBB	1.00	4.18	5.02	5.02
#FFFFFF	4.18	1.00	21.00	21.00
#000000	5.02	21.00	1.00	1.00
##000000	5.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6481BE

Deuteranopia (green-blind)

#5777BA

Tritanopia (blue-blind)

#0D8B93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #537dbb;
/* rgb */ color: rgb(83, 125, 187);
/* oklch */ color: oklch(58.7% 0.107 258.0);

Tailwind

colors: {
  custom: {
    50: '#8ba2cf',
    500: '#537dbb',
    950: '#000000',
  },
}

SCSS

$custom: #537dbb;
$custom-light: #8ba2cf;
$custom-dark: #000000;

JSON

{
  "hex": "#537dbb",
  "rgb": {
    "r": 83,
    "g": 125,
    "b": 187
  },
  "hsl": {
    "h": 215.769,
    "s": 43.333,
    "l": 52.941
  },
  "oklch": {
    "l": 0.5866,
    "c": 0.10668,
    "h": 258
  },
  "luminance": 0.20094
}

Semantic roles & 50–950 ramp

primary

#537DBB

secondary

#CBB99E

accent

#A055D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0F14

muted

#7D7E82

Preview Lab

Preview with #537DBB

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

Preview Lab → · Contrast checker → · Palette generator →