#3555B3#3555B3

#3555B3 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.9% C 0.154 H 266.4°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#3555B3
RGB	rgb(53, 85, 179)
HSL	hsl(225, 54%, 45%)
HSV	hsv(225, 70%, 70%)
CMYK	cmyk(70.4%, 52.5%, 0%, 29.8%)
CIE-LAB	lab(38.74, 20.68, -53.48)
CIE-LCH	lch(38.74, 57.34, 291.15°)
OKLab	oklab(47.94% -0.0096 -0.1537)
OKLCH	oklch(47.94% 0.154 266.4)
XYZ	xyz(12.8505, 10.5073, 43.9899)
Luminance	0.1051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3555B3 #B39335

analogous

#3594B3 #3555B3 #5435B3

triadic

#3555B3 #B33555 #55B335

tetradic

#3555B3 #B33594 #B39335 #35B354

square

#3555B3 #B33594 #B39335 #35B354

split-complementary

#3555B3 #B35435 #94B335

monochromatic

#192855 #273F84 #3555B3 #5876CD #879CDB

Accessibility & contrast

On white

6.77

#3555B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3555B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3555B3

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3555B3	#FFFFFF	#000000	##FFFFFF
##3555B3	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1761B6

Deuteranopia (green-blind)

#0056B1

Tritanopia (blue-blind)

#006B7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3555b3;
/* rgb */ color: rgb(53, 85, 179);
/* oklch */ color: oklch(47.9% 0.154 266.4);

Tailwind

colors: {
  custom: {
    50: '#7c84ca',
    500: '#3555b3',
    950: '#000000',
  },
}

SCSS

$custom: #3555b3;
$custom-light: #7c84ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3555b3",
  "rgb": {
    "r": 53,
    "g": 85,
    "b": 179
  },
  "hsl": {
    "h": 224.762,
    "s": 54.31,
    "l": 45.49
  },
  "oklch": {
    "l": 0.47937,
    "c": 0.15403,
    "h": 266.4
  },
  "luminance": 0.10509
}

Semantic roles & 50–950 ramp

primary

#3555B3

secondary

#C5B37F

accent

#B84ADE

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3555B3

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

Preview Lab → · Contrast checker → · Palette generator →