#57739B#57739B

#57739B is a mid, moderate blue. Relative luminance 0.167; OKLCH L 55.0% C 0.071 H 257.3°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#57739B
RGB	rgb(87, 115, 155)
HSL	hsl(215, 28%, 47%)
HSV	hsv(215, 44%, 61%)
CMYK	cmyk(43.9%, 25.8%, 0%, 39.2%)
CIE-LAB	lab(47.82, 0.85, -24.82)
CIE-LCH	lch(47.82, 24.83, 271.96°)
OKLab	oklab(55.02% -0.0156 -0.0691)
OKLCH	oklch(55.02% 0.071 257.3)
XYZ	xyz(15.9757, 16.6533, 33.3766)
Luminance	0.1665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#57739B #9B7F57

analogous

#57959B #57739B #5D579B

triadic

#57739B #9B5773 #739B57

tetradic

#57739B #9B5795 #9B7F57 #579B5D

square

#57739B #9B5795 #9B7F57 #579B5D

split-complementary

#57739B #9B5D57 #959B57

monochromatic

#2B394D #415674 #57739B #7B92B5 #A2B3CB

Accessibility & contrast

On white

4.85

#57739B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#57739B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #57739B

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##57739B	#FFFFFF	#000000	##FFFFFF
##57739B	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#64759D

Deuteranopia (green-blind)

#5C6F9A

Tritanopia (blue-blind)

#3E7C81

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #57739b;
/* rgb */ color: rgb(87, 115, 155);
/* oklch */ color: oklch(55.0% 0.071 257.3);

Tailwind

colors: {
  custom: {
    50: '#899bb8',
    500: '#57739b',
    950: '#000000',
  },
}

SCSS

$custom: #57739b;
$custom-light: #899bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#57739b",
  "rgb": {
    "r": 87,
    "g": 115,
    "b": 155
  },
  "hsl": {
    "h": 215.294,
    "s": 28.099,
    "l": 47.451
  },
  "oklch": {
    "l": 0.55018,
    "c": 0.07088,
    "h": 257.3
  },
  "luminance": 0.16654
}

Semantic roles & 50–950 ramp

primary

#57739B

secondary

#B8AA96

accent

#9C63C4

background

#F8F9FB

surface

#F0F2F6

border

#CBCCD0

text

#0C0E11

muted

#7D7E80

Preview Lab

Preview with #57739B

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

Preview Lab → · Contrast checker → · Palette generator →