#517FCB#517FCB

#517FCB is a mid, vivid blue. Relative luminance 0.212; OKLCH L 59.9% C 0.127 H 260.0°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#517FCB
RGB	rgb(81, 127, 203)
HSL	hsl(217, 54%, 56%)
HSV	hsv(217, 60%, 80%)
CMYK	cmyk(60.1%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(53.21, 7.55, -44.13)
CIE-LCH	lch(53.21, 44.77, 279.71°)
OKLab	oklab(59.88% -0.0222 -0.1252)
OKLCH	oklch(59.88% 0.127 260)
XYZ	xyz(21.7584, 21.2380, 59.4410)
Luminance	0.2124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FCB #CB9D51

analogous

#51BCCB #517FCB #6051CB

triadic

#517FCB #CB517F #7FCB51

tetradic

#517FCB #CB51BC #CB9D51 #51CB60

square

#517FCB #CB51BC #CB9D51 #51CB60

split-complementary

#517FCB #CB6051 #BCCB51

monochromatic

#25467C #3361AC #517FCB #80A2D9 #AFC4E7

Accessibility & contrast

On white

4.00

#517FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#517FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FCB

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FCB	#FFFFFF	#000000	##000000
##517FCB	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F85CE

Deuteranopia (green-blind)

#4E7AC9

Tritanopia (blue-blind)

#00909B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517fcb;
/* rgb */ color: rgb(81, 127, 203);
/* oklch */ color: oklch(59.9% 0.127 260.0);

Tailwind

colors: {
  custom: {
    50: '#8ca3db',
    500: '#517fcb',
    950: '#000000',
  },
}

SCSS

$custom: #517fcb;
$custom-light: #8ca3db;
$custom-dark: #000000;

JSON

{
  "hex": "#517fcb",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 217.377,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.59882,
    "c": 0.12713,
    "h": 260
  },
  "luminance": 0.2124
}

Semantic roles & 50–950 ramp

primary

#517FCB

secondary

#D5C2A3

accent

#A64ADD

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #517FCB

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

Preview Lab → · Contrast checker → · Palette generator →