#3155B4#3155B4

#3155B4 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.8% C 0.157 H 265.3°. Best body text is #FFFFFF at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#3155B4
RGB	rgb(49, 85, 180)
HSL	hsl(224, 57%, 45%)
HSV	hsv(224, 73%, 71%)
CMYK	cmyk(72.8%, 52.8%, 0%, 29.4%)
CIE-LAB	lab(38.63, 20.49, -54.25)
CIE-LCH	lch(38.63, 57.99, 290.69°)
OKLab	oklab(47.83% -0.013 -0.1561)
OKLCH	oklch(47.83% 0.157 265.3)
XYZ	xyz(12.7504, 10.4439, 44.5151)
Luminance	0.1045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3155B4 #B49031

analogous

#3197B4 #3155B4 #4E31B4

triadic

#3155B4 #B43155 #55B431

tetradic

#3155B4 #B43197 #B49031 #31B44E

square

#3155B4 #B43197 #B49031 #31B44E

split-complementary

#3155B4 #B44E31 #97B431

monochromatic

#172854 #243E84 #3155B4 #5275D0 #829BDD

Accessibility & contrast

On white

6.80

#3155B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3155B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3155B4

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3155B4	#FFFFFF	#000000	##FFFFFF
##3155B4	1.00	6.80	3.09	6.80
#FFFFFF	6.80	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1461B7

Deuteranopia (green-blind)

#0055B2

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3155b4;
/* rgb */ color: rgb(49, 85, 180);
/* oklch */ color: oklch(47.8% 0.157 265.3);

Tailwind

colors: {
  custom: {
    50: '#7a84cb',
    500: '#3155b4',
    950: '#000000',
  },
}

SCSS

$custom: #3155b4;
$custom-light: #7a84cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3155b4",
  "rgb": {
    "r": 49,
    "g": 85,
    "b": 180
  },
  "hsl": {
    "h": 223.511,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.47827,
    "c": 0.15663,
    "h": 265.3
  },
  "luminance": 0.10445
}

Semantic roles & 50–950 ramp

primary

#3155B4

secondary

#C6B17B

accent

#B647E0

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3155B4

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

Preview Lab → · Contrast checker → · Palette generator →