#51639D#51639D

#51639D is a mid, moderate blue. Relative luminance 0.131; OKLCH L 51.1% C 0.095 H 269.8°. Best body text is #FFFFFF at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#51639D
RGB	rgb(81, 99, 157)
HSL	hsl(226, 32%, 47%)
HSV	hsv(226, 48%, 62%)
CMYK	cmyk(48.4%, 36.9%, 0%, 38.4%)
CIE-LAB	lab(42.92, 9.69, -33.68)
CIE-LCH	lch(42.92, 35.04, 286.06°)
OKLab	oklab(51.14% -0.0004 -0.0949)
OKLCH	oklch(51.14% 0.095 269.8)
XYZ	xyz(13.9390, 13.1065, 33.6871)
Luminance	0.1311 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51639D #9D8B51

analogous

#51899D #51639D #65519D

triadic

#51639D #9D5163 #639D51

tetradic

#51639D #9D5189 #9D8B51 #519D65

square

#51639D #9D5189 #9D8B51 #519D65

split-complementary

#51639D #9D6551 #899D51

monochromatic

#27304C #3C4A75 #51639D #7484B7 #9CA8CC

Accessibility & contrast

On white

5.80

#51639D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.62

#51639D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #51639D

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51639D	#FFFFFF	#000000	##FFFFFF
##51639D	1.00	5.80	3.62	5.80
#FFFFFF	5.80	1.00	21.00	1.00
#000000	3.62	21.00	1.00	21.00
##FFFFFF	5.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D699F

Deuteranopia (green-blind)

#46629C

Tritanopia (blue-blind)

#336F78

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #51639d;
/* rgb */ color: rgb(81, 99, 157);
/* oklch */ color: oklch(51.1% 0.095 269.8);

Tailwind

colors: {
  custom: {
    50: '#868fba',
    500: '#51639d',
    950: '#000000',
  },
}

SCSS

$custom: #51639d;
$custom-light: #868fba;
$custom-dark: #000000;

JSON

{
  "hex": "#51639d",
  "rgb": {
    "r": 81,
    "g": 99,
    "b": 157
  },
  "hsl": {
    "h": 225.789,
    "s": 31.933,
    "l": 46.667
  },
  "oklch": {
    "l": 0.51138,
    "c": 0.0949,
    "h": 269.8
  },
  "luminance": 0.13107
}

Semantic roles & 50–950 ramp

primary

#51639D

secondary

#B9B091

accent

#AF60C8

background

#F8F8FB

surface

#F0F0F6

border

#CBCBD0

text

#0B0C11

muted

#7C7D80

Preview Lab

Preview with #51639D

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

Preview Lab → · Contrast checker → · Palette generator →