#5178B2#5178B2

#5178B2 is a mid, moderate blue. Relative luminance 0.184; OKLCH L 57.0% C 0.101 H 258.1°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#5178B2
RGB	rgb(81, 120, 178)
HSL	hsl(216, 39%, 51%)
HSV	hsv(216, 54%, 70%)
CMYK	cmyk(54.5%, 32.6%, 0%, 30.2%)
CIE-LAB	lab(49.97, 3.53, -34.90)
CIE-LCH	lch(49.97, 35.08, 275.77°)
OKLab	oklab(56.95% -0.0207 -0.0983)
OKLCH	oklch(56.95% 0.101 258.1)
XYZ	xyz(18.1429, 18.3952, 44.7054)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5178B2 #B28B51

analogous

#51A8B2 #5178B2 #5A51B2

triadic

#5178B2 #B25178 #78B251

tetradic

#5178B2 #B251A8 #B28B51 #51B25A

square

#5178B2 #B251A8 #B28B51 #51B25A

split-complementary

#5178B2 #B25A51 #A8B251

monochromatic

#2A3F5F #3D5B89 #5178B2 #7B99C5 #A6BAD8

Accessibility & contrast

On white

4.49

#5178B2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#5178B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5178B2

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5178B2	#FFFFFF	#000000	##000000
##5178B2	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617CB4

Deuteranopia (green-blind)

#5573B1

Tritanopia (blue-blind)

#18858D

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #5178b2;
/* rgb */ color: rgb(81, 120, 178);
/* oklch */ color: oklch(57.0% 0.101 258.1);

Tailwind

colors: {
  custom: {
    50: '#889ec9',
    500: '#5178b2',
    950: '#000000',
  },
}

SCSS

$custom: #5178b2;
$custom-light: #889ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#5178b2",
  "rgb": {
    "r": 81,
    "g": 120,
    "b": 178
  },
  "hsl": {
    "h": 215.876,
    "s": 38.645,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56953,
    "c": 0.1005,
    "h": 258.1
  },
  "luminance": 0.18397
}

Semantic roles & 50–950 ramp

primary

#5178B2

secondary

#C5B49A

accent

#9F59CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #5178B2

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

Preview Lab → · Contrast checker → · Palette generator →