#517FCA#517FCA

#517FCA is a mid, vivid blue. Relative luminance 0.212; OKLCH L 59.8% C 0.126 H 259.7°. Best body text is #000000 at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#517FCA
RGB	rgb(81, 127, 202)
HSL	hsl(217, 53%, 55%)
HSV	hsv(217, 60%, 79%)
CMYK	cmyk(59.9%, 37.1%, 0%, 20.8%)
CIE-LAB	lab(53.16, 7.22, -43.65)
CIE-LCH	lch(53.16, 44.24, 279.39°)
OKLab	oklab(59.83% -0.0224 -0.1238)
OKLCH	oklch(59.83% 0.126 259.7)
XYZ	xyz(21.6396, 21.1905, 58.8155)
Luminance	0.2119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517FCA #CA9C51

analogous

#51BBCA #517FCA #5F51CA

triadic

#517FCA #CA517F #7FCA51

tetradic

#517FCA #CA51BB #CA9C51 #51CA5F

square

#517FCA #CA51BB #CA9C51 #51CA5F

split-complementary

#517FCA #CA5F51 #BBCA51

monochromatic

#25467B #3461AA #517FCA #80A2D8 #AFC4E7

Accessibility & contrast

On white

4.01

#517FCA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.24

#517FCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517FCA

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517FCA	#FFFFFF	#000000	##000000
##517FCA	1.00	4.01	5.24	5.24
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.24	21.00	1.00	1.00
##000000	5.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F85CD

Deuteranopia (green-blind)

#4F7AC8

Tritanopia (blue-blind)

#00909B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #517fca;
/* rgb */ color: rgb(81, 127, 202);
/* oklch */ color: oklch(59.8% 0.126 259.7);

Tailwind

colors: {
  custom: {
    50: '#8ca3da',
    500: '#517fca',
    950: '#000000',
  },
}

SCSS

$custom: #517fca;
$custom-light: #8ca3da;
$custom-dark: #000000;

JSON

{
  "hex": "#517fca",
  "rgb": {
    "r": 81,
    "g": 127,
    "b": 202
  },
  "hsl": {
    "h": 217.19,
    "s": 53.304,
    "l": 55.49
  },
  "oklch": {
    "l": 0.59825,
    "c": 0.12577,
    "h": 259.7
  },
  "luminance": 0.21192
}

Semantic roles & 50–950 ramp

primary

#517FCA

secondary

#D5C1A2

accent

#A54BDD

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #517FCA

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

Preview Lab → · Contrast checker → · Palette generator →