#517BD3#517BD3

#517BD3 is a mid, vivid blue. Relative luminance 0.206; OKLCH L 59.5% C 0.143 H 263.4°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#517BD3
RGB	rgb(81, 123, 211)
HSL	hsl(221, 60%, 57%)
HSV	hsv(221, 62%, 83%)
CMYK	cmyk(61.6%, 41.7%, 0%, 17.3%)
CIE-LAB	lab(52.53, 12.69, -49.75)
CIE-LCH	lch(52.53, 51.34, 284.30°)
OKLab	oklab(59.49% -0.0163 -0.1417)
OKLCH	oklch(59.49% 0.143 263.4)
XYZ	xyz(22.2301, 20.6164, 64.4233)
Luminance	0.2062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517BD3 #D3A951

analogous

#51BCD3 #517BD3 #6851D3

triadic

#517BD3 #D3517B #7BD351

tetradic

#517BD3 #D351BC #D3A951 #51D368

square

#517BD3 #D351BC #D3A951 #51D368

split-complementary

#517BD3 #D36851 #BCD351

monochromatic

#224387 #2F5BB8 #517BD3 #82A0DF #B3C5EC

Accessibility & contrast

On white

4.10

#517BD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#517BD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517BD3

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517BD3	#FFFFFF	#000000	##000000
##517BD3	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5384D6

Deuteranopia (green-blind)

#4178D1

Tritanopia (blue-blind)

#008F9D

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #517bd3;
/* rgb */ color: rgb(81, 123, 211);
/* oklch */ color: oklch(59.5% 0.143 263.4);

Tailwind

colors: {
  custom: {
    50: '#8da0e1',
    500: '#517bd3',
    950: '#000000',
  },
}

SCSS

$custom: #517bd3;
$custom-light: #8da0e1;
$custom-dark: #000000;

JSON

{
  "hex": "#517bd3",
  "rgb": {
    "r": 81,
    "g": 123,
    "b": 211
  },
  "hsl": {
    "h": 220.615,
    "s": 59.633,
    "l": 57.255
  },
  "oklch": {
    "l": 0.59494,
    "c": 0.14262,
    "h": 263.4
  },
  "luminance": 0.20618
}

Semantic roles & 50–950 ramp

primary

#517BD3

secondary

#DAC9A6

accent

#B045E3

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #517BD3

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

Preview Lab → · Contrast checker → · Palette generator →