#3557B2#3557B2

#3557B2 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.3% C 0.150 H 265.6°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#3557B2
RGB	rgb(53, 87, 178)
HSL	hsl(224, 54%, 45%)
HSV	hsv(224, 70%, 70%)
CMYK	cmyk(70.2%, 51.1%, 0%, 30.2%)
CIE-LAB	lab(39.22, 19.01, -52.11)
CIE-LCH	lch(39.22, 55.47, 290.04°)
OKLab	oklab(48.28% -0.0114 -0.1497)
OKLCH	oklch(48.28% 0.15 265.6)
XYZ	xyz(12.9095, 10.7863, 43.5125)
Luminance	0.1079 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3557B2 #B29035

analogous

#3595B2 #3557B2 #5135B2

triadic

#3557B2 #B23557 #57B235

tetradic

#3557B2 #B23595 #B29035 #35B251

square

#3557B2 #B23595 #B29035 #35B251

split-complementary

#3557B2 #B25135 #95B235

monochromatic

#192954 #274083 #3557B2 #5777CD #869DDB

Accessibility & contrast

On white

6.65

#3557B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#3557B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3557B2

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3557B2	#FFFFFF	#000000	##FFFFFF
##3557B2	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2062B5

Deuteranopia (green-blind)

#0057B0

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3557b2;
/* rgb */ color: rgb(53, 87, 178);
/* oklch */ color: oklch(48.3% 0.150 265.6);

Tailwind

colors: {
  custom: {
    50: '#7c85ca',
    500: '#3557b2',
    950: '#000000',
  },
}

SCSS

$custom: #3557b2;
$custom-light: #7c85ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3557b2",
  "rgb": {
    "r": 53,
    "g": 87,
    "b": 178
  },
  "hsl": {
    "h": 223.68,
    "s": 54.113,
    "l": 45.294
  },
  "oklch": {
    "l": 0.4828,
    "c": 0.15012,
    "h": 265.6
  },
  "luminance": 0.10788
}

Semantic roles & 50–950 ramp

primary

#3557B2

secondary

#C5B27E

accent

#B54ADD

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3557B2

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

Preview Lab → · Contrast checker → · Palette generator →