#51739B#51739B

#51739B is a mid, moderate cyan. Relative luminance 0.164; OKLCH L 54.6% C 0.074 H 253.1°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#51739B
RGB	rgb(81, 115, 155)
HSL	hsl(212, 31%, 46%)
HSV	hsv(212, 48%, 61%)
CMYK	cmyk(47.7%, 25.8%, 0%, 39.2%)
CIE-LAB	lab(47.46, -0.74, -25.40)
CIE-LCH	lch(47.46, 25.41, 268.32°)
OKLab	oklab(54.64% -0.0215 -0.0709)
OKLCH	oklch(54.64% 0.074 253.1)
XYZ	xyz(15.4385, 16.3763, 33.3514)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51739B #9B7951

analogous

#51989B #51739B #54519B

triadic

#51739B #9B5173 #739B51

tetradic

#51739B #9B5198 #9B7951 #519B54

square

#51739B #9B5198 #9B7951 #519B54

split-complementary

#51739B #9B5451 #989B51

monochromatic

#27374B #3C5573 #51739B #7392B6 #9BB1CB

Accessibility & contrast

On white

4.91

#51739B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#51739B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #51739B

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51739B	#FFFFFF	#000000	##FFFFFF
##51739B	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#63759D

Deuteranopia (green-blind)

#5A6D9A

Tritanopia (blue-blind)

#327C81

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #51739b;
/* rgb */ color: rgb(81, 115, 155);
/* oklch */ color: oklch(54.6% 0.074 253.1);

Tailwind

colors: {
  custom: {
    50: '#869bb8',
    500: '#51739b',
    950: '#000000',
  },
}

SCSS

$custom: #51739b;
$custom-light: #869bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#51739b",
  "rgb": {
    "r": 81,
    "g": 115,
    "b": 155
  },
  "hsl": {
    "h": 212.432,
    "s": 31.356,
    "l": 46.275
  },
  "oklch": {
    "l": 0.54644,
    "c": 0.07409,
    "h": 253.1
  },
  "luminance": 0.16377
}

Semantic roles & 50–950 ramp

primary

#51739B

secondary

#B8A690

accent

#9860C8

background

#F8F9FB

surface

#F0F2F6

border

#CBCCD0

text

#0B0E11

muted

#7C7E80

Preview Lab

Preview with #51739B

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

Preview Lab → · Contrast checker → · Palette generator →