#3155B1#3155B1

#3155B1 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.6% C 0.152 H 265.0°. Best body text is #FFFFFF at 6.85:1 contrast (WCAG AA passes).

Color values

HEX	#3155B1
RGB	rgb(49, 85, 177)
HSL	hsl(223, 57%, 44%)
HSV	hsv(223, 72%, 69%)
CMYK	cmyk(72.3%, 52%, 0%, 30.6%)
CIE-LAB	lab(38.42, 19.37, -52.83)
CIE-LCH	lch(38.42, 56.26, 290.13°)
OKLab	oklab(47.6% -0.0133 -0.1519)
OKLCH	oklch(47.6% 0.152 265)
XYZ	xyz(12.4481, 10.3230, 42.9229)
Luminance	0.1032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3155B1 #B18D31

analogous

#3195B1 #3155B1 #4D31B1

triadic

#3155B1 #B13155 #55B131

tetradic

#3155B1 #B13195 #B18D31 #31B14D

square

#3155B1 #B13195 #B18D31 #31B14D

split-complementary

#3155B1 #B14D31 #95B131

monochromatic

#162751 #243E81 #3155B1 #5174CF #809ADC

Accessibility & contrast

On white

6.85

#3155B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3155B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3155B1

6.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3155B1	#FFFFFF	#000000	##FFFFFF
##3155B1	1.00	6.85	3.06	6.85
#FFFFFF	6.85	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A61B4

Deuteranopia (green-blind)

#0055AF

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3155b1;
/* rgb */ color: rgb(49, 85, 177);
/* oklch */ color: oklch(47.6% 0.152 265.0);

Tailwind

colors: {
  custom: {
    50: '#7a84c9',
    500: '#3155b1',
    950: '#000000',
  },
}

SCSS

$custom: #3155b1;
$custom-light: #7a84c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3155b1",
  "rgb": {
    "r": 49,
    "g": 85,
    "b": 177
  },
  "hsl": {
    "h": 223.125,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.47599,
    "c": 0.15247,
    "h": 265
  },
  "luminance": 0.10324
}

Semantic roles & 50–950 ramp

primary

#3155B1

secondary

#C5B079

accent

#B548E0

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3155B1

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

Preview Lab → · Contrast checker → · Palette generator →