#3557BC#3557BC

#3557BC is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.0% C 0.164 H 266.3°. Best body text is #FFFFFF at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#3557BC
RGB	rgb(53, 87, 188)
HSL	hsl(225, 56%, 47%)
HSV	hsv(225, 72%, 74%)
CMYK	cmyk(71.8%, 53.7%, 0%, 26.3%)
CIE-LAB	lab(39.92, 22.71, -56.85)
CIE-LCH	lch(39.92, 61.21, 291.78°)
OKLab	oklab(49.03% -0.0105 -0.1636)
OKLCH	oklch(49.03% 0.164 266.3)
XYZ	xyz(13.9503, 11.2027, 48.9943)
Luminance	0.1120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3557BC #BC9A35

analogous

#359BBC #3557BC #5735BC

triadic

#3557BC #BC3557 #57BC35

tetradic

#3557BC #BC359B #BC9A35 #35BC57

square

#3557BC #BC359B #BC9A35 #35BC57

split-complementary

#3557BC #BC5735 #9BBC35

monochromatic

#1A2B5D #28418C #3557BC #5D7AD1 #8DA1DF

Accessibility & contrast

On white

6.48

#3557BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#3557BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3557BC

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3557BC	#FFFFFF	#000000	##FFFFFF
##3557BC	1.00	6.48	3.24	6.48
#FFFFFF	6.48	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0965C0

Deuteranopia (green-blind)

#0058BA

Tritanopia (blue-blind)

#006F81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3557bc;
/* rgb */ color: rgb(53, 87, 188);
/* oklch */ color: oklch(49.0% 0.164 266.3);

Tailwind

colors: {
  custom: {
    50: '#7e85d1',
    500: '#3557bc',
    950: '#000000',
  },
}

SCSS

$custom: #3557bc;
$custom-light: #7e85d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3557bc",
  "rgb": {
    "r": 53,
    "g": 87,
    "b": 188
  },
  "hsl": {
    "h": 224.889,
    "s": 56.017,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49034,
    "c": 0.16395,
    "h": 266.3
  },
  "luminance": 0.11204
}

Semantic roles & 50–950 ramp

primary

#3557BC

secondary

#C9B884

accent

#B948DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3557BC

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

Preview Lab → · Contrast checker → · Palette generator →