#517BCB#517BCB

#517BCB is a mid, vivid blue. Relative luminance 0.202; OKLCH L 59.0% C 0.132 H 262.2°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#517BCB
RGB	rgb(81, 123, 203)
HSL	hsl(219, 54%, 56%)
HSV	hsv(219, 60%, 80%)
CMYK	cmyk(60.1%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(52.09, 9.98, -45.90)
CIE-LCH	lch(52.09, 46.98, 282.27°)
OKLab	oklab(59.01% -0.0179 -0.1304)
OKLCH	oklch(59.01% 0.132 262.2)
XYZ	xyz(21.2520, 20.2252, 59.2722)
Luminance	0.2023 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BCB #CBA151

analogous

#51B8CB #517BCB #6451CB

triadic

#517BCB #CB517B #7BCB51

tetradic

#517BCB #CB51B8 #CBA151 #51CB64

square

#517BCB #CB51B8 #CBA151 #51CB64

split-complementary

#517BCB #CB6451 #B8CB51

monochromatic

#25437C #335DAC #517BCB #809FD9 #AFC2E7

Accessibility & contrast

On white

4.16

#517BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#517BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BCB

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BCB	#FFFFFF	#000000	##000000
##517BCB	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5882CE

Deuteranopia (green-blind)

#4877C9

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #517bcb;
/* rgb */ color: rgb(81, 123, 203);
/* oklch */ color: oklch(59.0% 0.132 262.2);

Tailwind

colors: {
  custom: {
    50: '#8ca0db',
    500: '#517bcb',
    950: '#000000',
  },
}

SCSS

$custom: #517bcb;
$custom-light: #8ca0db;
$custom-dark: #000000;

JSON

{
  "hex": "#517bcb",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 219.344,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.59015,
    "c": 0.13163,
    "h": 262.2
  },
  "luminance": 0.20227
}

Semantic roles & 50–950 ramp

primary

#517BCB

secondary

#D5C4A3

accent

#AB4ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #517BCB

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

Preview Lab → · Contrast checker → · Palette generator →