#517EC9#517EC9

#517EC9 is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.6% C 0.126 H 260.1°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#517EC9
RGB	rgb(81, 126, 201)
HSL	hsl(218, 53%, 55%)
HSV	hsv(218, 60%, 79%)
CMYK	cmyk(59.7%, 37.3%, 0%, 21.2%)
CIE-LAB	lab(52.82, 7.49, -43.60)
CIE-LCH	lch(52.82, 44.24, 279.74°)
OKLab	oklab(59.55% -0.0216 -0.1236)
OKLCH	oklch(59.55% 0.126 260.1)
XYZ	xyz(21.3931, 20.8862, 58.1511)
Luminance	0.2089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517EC9 #C99C51

analogous

#51BAC9 #517EC9 #6051C9

triadic

#517EC9 #C9517E #7EC951

tetradic

#517EC9 #C951BA #C99C51 #51C960

square

#517EC9 #C951BA #C99C51 #51C960

split-complementary

#517EC9 #C96051 #BAC951

monochromatic

#26457A #3460A9 #517EC9 #80A1D7 #AEC3E6

Accessibility & contrast

On white

4.06

#517EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#517EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517EC9

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517EC9	#FFFFFF	#000000	##000000
##517EC9	1.00	4.06	5.18	5.18
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E84CC

Deuteranopia (green-blind)

#4E79C7

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #517ec9;
/* rgb */ color: rgb(81, 126, 201);
/* oklch */ color: oklch(59.6% 0.126 260.1);

Tailwind

colors: {
  custom: {
    50: '#8ba3da',
    500: '#517ec9',
    950: '#000000',
  },
}

SCSS

$custom: #517ec9;
$custom-light: #8ba3da;
$custom-dark: #000000;

JSON

{
  "hex": "#517ec9",
  "rgb": {
    "r": 81,
    "g": 126,
    "b": 201
  },
  "hsl": {
    "h": 217.5,
    "s": 52.632,
    "l": 55.294
  },
  "oklch": {
    "l": 0.5955,
    "c": 0.12552,
    "h": 260.1
  },
  "luminance": 0.20888
}

Semantic roles & 50–950 ramp

primary

#517EC9

secondary

#D4C1A2

accent

#A64CDC

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #517EC9

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

Preview Lab → · Contrast checker → · Palette generator →