#51668F#51668F

#51668F is a mid, moderate blue. Relative luminance 0.132; OKLCH L 51.1% C 0.070 H 263.2°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#51668F
RGB	rgb(81, 102, 143)
HSL	hsl(220, 28%, 44%)
HSV	hsv(220, 43%, 56%)
CMYK	cmyk(43.4%, 28.7%, 0%, 43.9%)
CIE-LAB	lab(43.11, 3.48, -25.03)
CIE-LCH	lch(43.11, 25.27, 277.91°)
OKLab	oklab(51.07% -0.0083 -0.0698)
OKLCH	oklch(51.07% 0.07 263.2)
XYZ	xyz(13.1011, 13.2345, 27.8455)
Luminance	0.1323 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51668F #8F7A51

analogous

#51858F #51668F #5B518F

triadic

#51668F #8F5166 #668F51

tetradic

#51668F #8F5185 #8F7A51 #518F5B

square

#51668F #8F5185 #8F7A51 #518F5B

split-complementary

#51668F #8F5B51 #858F51

monochromatic

#252E41 #3B4A68 #51668F #6F85AE #97A6C4

Accessibility & contrast

On white

5.76

#51668F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#51668F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #51668F

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51668F	#FFFFFF	#000000	##FFFFFF
##51668F	1.00	5.76	3.65	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#576991

Deuteranopia (green-blind)

#51638E

Tritanopia (blue-blind)

#3B6F74

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #51668f;
/* rgb */ color: rgb(81, 102, 143);
/* oklch */ color: oklch(51.1% 0.070 263.2);

Tailwind

colors: {
  custom: {
    50: '#8591b0',
    500: '#51668f',
    950: '#000000',
  },
}

SCSS

$custom: #51668f;
$custom-light: #8591b0;
$custom-dark: #000000;

JSON

{
  "hex": "#51668f",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 143
  },
  "hsl": {
    "h": 219.677,
    "s": 27.679,
    "l": 43.922
  },
  "oklch": {
    "l": 0.51065,
    "c": 0.07034,
    "h": 263.2
  },
  "luminance": 0.13235
}

Semantic roles & 50–950 ramp

primary

#51668F

secondary

#B1A48B

accent

#A364C4

background

#F8F8FA

surface

#EFF0F4

border

#CACBCE

text

#0B0C10

muted

#7C7D7F

Preview Lab

Preview with #51668F

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

Preview Lab → · Contrast checker → · Palette generator →