#3578B1#3578B1

#3578B1 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.6% C 0.112 H 247.2°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3578B1
RGB	rgb(53, 120, 177)
HSL	hsl(208, 54%, 45%)
HSV	hsv(208, 70%, 69%)
CMYK	cmyk(70.1%, 32.2%, 0%, 30.6%)
CIE-LAB	lab(48.71, -2.19, -36.39)
CIE-LCH	lch(48.71, 36.45, 266.56°)
OKLab	oklab(55.62% -0.0433 -0.103)
OKLCH	oklch(55.62% 0.112 247.2)
XYZ	xyz(16.1175, 17.3624, 44.0883)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3578B1 #B16E35

analogous

#35B1AC #3578B1 #353AB1

triadic

#3578B1 #B13578 #78B135

tetradic

#3578B1 #AC35B1 #B16E35 #3AB135

square

#3578B1 #AC35B1 #B16E35 #3AB135

split-complementary

#3578B1 #B1353A #B1AC35

monochromatic

#193853 #275882 #3578B1 #5796CD #86B4DB

Accessibility & contrast

On white

4.70

#3578B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3578B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3578B1

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3578B1	#FFFFFF	#000000	##FFFFFF
##3578B1	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7AB3

Deuteranopia (green-blind)

#4D6EB0

Tritanopia (blue-blind)

#00868C

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3578b1;
/* rgb */ color: rgb(53, 120, 177);
/* oklch */ color: oklch(55.6% 0.112 247.2);

Tailwind

colors: {
  custom: {
    50: '#7b9ec8',
    500: '#3578b1',
    950: '#000000',
  },
}

SCSS

$custom: #3578b1;
$custom-light: #7b9ec8;
$custom-dark: #000000;

JSON

{
  "hex": "#3578b1",
  "rgb": {
    "r": 53,
    "g": 120,
    "b": 177
  },
  "hsl": {
    "h": 207.581,
    "s": 53.913,
    "l": 45.098
  },
  "oklch": {
    "l": 0.55619,
    "c": 0.11177,
    "h": 247.2
  },
  "luminance": 0.17364
}

Semantic roles & 50–950 ramp

primary

#3578B1

secondary

#C49E7D

accent

#8E4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #3578B1

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

Preview Lab → · Contrast checker → · Palette generator →