#517DBB#517DBB

#517DBB is a mid, moderate blue. Relative luminance 0.200; OKLCH L 58.6% C 0.108 H 257.1°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#517DBB
RGB	rgb(81, 125, 187)
HSL	hsl(215, 44%, 53%)
HSV	hsv(215, 57%, 73%)
CMYK	cmyk(56.7%, 33.2%, 0%, 26.7%)
CIE-LAB	lab(51.84, 3.45, -37.16)
CIE-LCH	lch(51.84, 37.32, 275.31°)
OKLab	oklab(58.55% -0.024 -0.1048)
OKLCH	oklch(58.55% 0.108 257.1)
XYZ	xyz(19.6935, 20.0028, 49.8272)
Luminance	0.2000 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#517DBB #BB8F51

analogous

#51B2BB #517DBB #5A51BB

triadic

#517DBB #BB517D #7DBB51

tetradic

#517DBB #BB51B2 #BB8F51 #51BB5A

square

#517DBB #BB51B2 #BB8F51 #51BB5A

split-complementary

#517DBB #BB5A51 #B2BB51

monochromatic

#294369 #3A6095 #517DBB #7D9ECC #A9BFDD

Accessibility & contrast

On white

4.20

#517DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.00

#517DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #517DBB

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##517DBB	#FFFFFF	#000000	##000000
##517DBB	1.00	4.20	5.00	5.00
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.00	21.00	1.00	1.00
##000000	5.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6481BE

Deuteranopia (green-blind)

#5677BA

Tritanopia (blue-blind)

#008B93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #517dbb;
/* rgb */ color: rgb(81, 125, 187);
/* oklch */ color: oklch(58.6% 0.108 257.1);

Tailwind

colors: {
  custom: {
    50: '#8aa2cf',
    500: '#517dbb',
    950: '#000000',
  },
}

SCSS

$custom: #517dbb;
$custom-light: #8aa2cf;
$custom-dark: #000000;

JSON

{
  "hex": "#517dbb",
  "rgb": {
    "r": 81,
    "g": 125,
    "b": 187
  },
  "hsl": {
    "h": 215.094,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58554,
    "c": 0.10757,
    "h": 257.1
  },
  "luminance": 0.20004
}

Semantic roles & 50–950 ramp

primary

#517DBB

secondary

#CBB89D

accent

#9F54D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0F14

muted

#7D7E82

Preview Lab

Preview with #517DBB

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

Preview Lab → · Contrast checker → · Palette generator →