#51669B#51669B

#51669B is a mid, moderate blue. Relative luminance 0.136; OKLCH L 51.7% C 0.088 H 266.9°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#51669B
RGB	rgb(81, 102, 155)
HSL	hsl(223, 31%, 46%)
HSV	hsv(223, 48%, 61%)
CMYK	cmyk(47.7%, 34.2%, 0%, 39.2%)
CIE-LAB	lab(43.68, 7.19, -31.30)
CIE-LCH	lch(43.68, 32.11, 282.94°)
OKLab	oklab(51.69% -0.0048 -0.088)
OKLCH	oklch(51.69% 0.088 266.9)
XYZ	xyz(14.0592, 13.6178, 32.8917)
Luminance	0.1362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51669B #9B8651

analogous

#518B9B #51669B #61519B

triadic

#51669B #9B5166 #669B51

tetradic

#51669B #9B518B #9B8651 #519B61

square

#51669B #9B518B #9B8651 #519B61

split-complementary

#51669B #9B6151 #8B9B51

monochromatic

#27314B #3C4C73 #51669B #7386B6 #9BA9CB

Accessibility & contrast

On white

5.64

#51669B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#51669B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #51669B

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51669B	#FFFFFF	#000000	##FFFFFF
##51669B	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#526B9D

Deuteranopia (green-blind)

#4B649A

Tritanopia (blue-blind)

#347179

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #51669b;
/* rgb */ color: rgb(81, 102, 155);
/* oklch */ color: oklch(51.7% 0.088 266.9);

Tailwind

colors: {
  custom: {
    50: '#8691b8',
    500: '#51669b',
    950: '#000000',
  },
}

SCSS

$custom: #51669b;
$custom-light: #8691b8;
$custom-dark: #000000;

JSON

{
  "hex": "#51669b",
  "rgb": {
    "r": 81,
    "g": 102,
    "b": 155
  },
  "hsl": {
    "h": 222.973,
    "s": 31.356,
    "l": 46.275
  },
  "oklch": {
    "l": 0.51691,
    "c": 0.08811,
    "h": 266.9
  },
  "luminance": 0.13619
}

Semantic roles & 50–950 ramp

primary

#51669B

secondary

#B8AD90

accent

#AA60C8

background

#F8F8FB

surface

#F0F0F6

border

#CBCBD0

text

#0B0C11

muted

#7C7D80

Preview Lab

Preview with #51669B

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

Preview Lab → · Contrast checker → · Palette generator →