#537DD9#537DD9

#537DD9 is a mid, vivid blue. Relative luminance 0.215; OKLCH L 60.4% C 0.148 H 264.0°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#537DD9
RGB	rgb(83, 125, 217)
HSL	hsl(221, 64%, 59%)
HSV	hsv(221, 62%, 85%)
CMYK	cmyk(61.8%, 42.4%, 0%, 14.9%)
CIE-LAB	lab(53.51, 13.87, -51.57)
CIE-LCH	lch(53.51, 53.41, 285.05°)
OKLab	oklab(60.39% -0.0154 -0.147)
OKLCH	oklch(60.39% 0.148 264)
XYZ	xyz(23.4209, 21.5139, 68.5505)
Luminance	0.2152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#537DD9 #D9AF53

analogous

#53C0D9 #537DD9 #6C53D9

triadic

#537DD9 #D9537D #7DD953

tetradic

#537DD9 #D953C0 #D9AF53 #53D96C

square

#537DD9 #D953C0 #D9AF53 #53D96C

split-complementary

#537DD9 #D96C53 #C0D953

monochromatic

#204491 #2B5BC4 #537DD9 #85A3E4 #B7C9EF

Accessibility & contrast

On white

3.96

#537DD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#537DD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #537DD9

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##537DD9	#FFFFFF	#000000	##000000
##537DD9	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5386DD

Deuteranopia (green-blind)

#3F7AD7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #537dd9;
/* rgb */ color: rgb(83, 125, 217);
/* oklch */ color: oklch(60.4% 0.148 264.0);

Tailwind

colors: {
  custom: {
    50: '#8fa2e5',
    500: '#537dd9',
    950: '#000000',
  },
}

SCSS

$custom: #537dd9;
$custom-light: #8fa2e5;
$custom-dark: #000000;

JSON

{
  "hex": "#537dd9",
  "rgb": {
    "r": 83,
    "g": 125,
    "b": 217
  },
  "hsl": {
    "h": 221.194,
    "s": 63.81,
    "l": 58.824
  },
  "oklch": {
    "l": 0.60385,
    "c": 0.14777,
    "h": 264
  },
  "luminance": 0.21516
}

Semantic roles & 50–950 ramp

primary

#537DD9

secondary

#DECEAA

accent

#B341E7

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0D0F16

muted

#7E7E84

Preview Lab

Preview with #537DD9

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

Preview Lab → · Contrast checker → · Palette generator →