#3155B5#3155B5

#3155B5 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.9% C 0.158 H 265.3°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#3155B5
RGB	rgb(49, 85, 181)
HSL	hsl(224, 57%, 45%)
HSV	hsv(224, 73%, 71%)
CMYK	cmyk(72.9%, 53%, 0%, 29%)
CIE-LAB	lab(38.70, 20.87, -54.73)
CIE-LCH	lch(38.70, 58.57, 290.87°)
OKLab	oklab(47.9% -0.0129 -0.1575)
OKLCH	oklch(47.9% 0.158 265.3)
XYZ	xyz(12.8527, 10.4848, 45.0535)
Luminance	0.1049 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3155B5 #B59131

analogous

#3197B5 #3155B5 #4F31B5

triadic

#3155B5 #B53155 #55B531

tetradic

#3155B5 #B53197 #B59131 #31B54F

square

#3155B5 #B53197 #B59131 #31B54F

split-complementary

#3155B5 #B54F31 #97B531

monochromatic

#172855 #243E85 #3155B5 #5375D0 #839CDD

Accessibility & contrast

On white

6.78

#3155B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3155B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3155B5

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3155B5	#FFFFFF	#000000	##FFFFFF
##3155B5	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1161B8

Deuteranopia (green-blind)

#0055B3

Tritanopia (blue-blind)

#006C7D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3155b5;
/* rgb */ color: rgb(49, 85, 181);
/* oklch */ color: oklch(47.9% 0.158 265.3);

Tailwind

colors: {
  custom: {
    50: '#7b84cc',
    500: '#3155b5',
    950: '#000000',
  },
}

SCSS

$custom: #3155b5;
$custom-light: #7b84cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3155b5",
  "rgb": {
    "r": 49,
    "g": 85,
    "b": 181
  },
  "hsl": {
    "h": 223.636,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.47903,
    "c": 0.158,
    "h": 265.3
  },
  "luminance": 0.10486
}

Semantic roles & 50–950 ramp

primary

#3155B5

secondary

#C7B27B

accent

#B747E1

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3155B5

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

Preview Lab → · Contrast checker → · Palette generator →