#517CBB#517CBB

#517CBB is a mid, moderate blue. Relative luminance 0.198; OKLCH L 58.3% C 0.109 H 257.8°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#517CBB
RGB	rgb(81, 124, 187)
HSL	hsl(216, 44%, 53%)
HSV	hsv(216, 57%, 73%)
CMYK	cmyk(56.7%, 33.7%, 0%, 26.7%)
CIE-LAB	lab(51.55, 4.05, -37.61)
CIE-LCH	lch(51.55, 37.82, 276.15°)
OKLab	oklab(58.33% -0.0229 -0.1062)
OKLCH	oklch(58.33% 0.109 257.8)
XYZ	xyz(19.5675, 19.7509, 49.7852)
Luminance	0.1975 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517CBB #BB9051

analogous

#51B1BB #517CBB #5B51BB

triadic

#517CBB #BB517C #7CBB51

tetradic

#517CBB #BB51B1 #BB9051 #51BB5B

square

#517CBB #BB51B1 #BB9051 #51BB5B

split-complementary

#517CBB #BB5B51 #B1BB51

monochromatic

#294369 #3A5F95 #517CBB #7D9DCC #A9BEDD

Accessibility & contrast

On white

4.24

#517CBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#517CBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517CBB

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517CBB	#FFFFFF	#000000	##000000
##517CBB	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6280BE

Deuteranopia (green-blind)

#5576BA

Tritanopia (blue-blind)

#008A93

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #517cbb;
/* rgb */ color: rgb(81, 124, 187);
/* oklch */ color: oklch(58.3% 0.109 257.8);

Tailwind

colors: {
  custom: {
    50: '#8aa1d0',
    500: '#517cbb',
    950: '#000000',
  },
}

SCSS

$custom: #517cbb;
$custom-light: #8aa1d0;
$custom-dark: #000000;

JSON

{
  "hex": "#517cbb",
  "rgb": {
    "r": 81,
    "g": 124,
    "b": 187
  },
  "hsl": {
    "h": 215.66,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58331,
    "c": 0.10861,
    "h": 257.8
  },
  "luminance": 0.19752
}

Semantic roles & 50–950 ramp

primary

#517CBB

secondary

#CBB89D

accent

#A054D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #517CBB

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

Preview Lab → · Contrast checker → · Palette generator →