#3151B5#3151B5

#3151B5 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.1% C 0.163 H 266.6°. Best body text is #FFFFFF at 7.06:1 contrast (WCAG AA passes).

Color values

HEX	#3151B5
RGB	rgb(49, 81, 181)
HSL	hsl(225, 57%, 45%)
HSV	hsv(225, 73%, 71%)
CMYK	cmyk(72.9%, 55.2%, 0%, 29%)
CIE-LAB	lab(37.61, 23.49, -56.49)
CIE-LCH	lch(37.61, 61.18, 292.58°)
OKLab	oklab(47.08% -0.0096 -0.1627)
OKLCH	oklch(47.08% 0.163 266.6)
XYZ	xyz(12.5466, 9.8727, 44.9515)
Luminance	0.0987 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B5 #B59531

analogous

#3193B5 #3151B5 #5331B5

triadic

#3151B5 #B53151 #51B531

tetradic

#3151B5 #B53193 #B59531 #31B553

square

#3151B5 #B53193 #B59531 #31B553

split-complementary

#3151B5 #B55331 #93B531

monochromatic

#172655 #243B85 #3151B5 #5371D0 #8399DD

Accessibility & contrast

On white

7.06

#3151B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3151B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B5

7.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B5	#FFFFFF	#000000	##FFFFFF
##3151B5	1.00	7.06	2.97	7.06
#FFFFFF	7.06	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB8

Deuteranopia (green-blind)

#0053B3

Tritanopia (blue-blind)

#00697B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3151b5;
/* rgb */ color: rgb(49, 81, 181);
/* oklch */ color: oklch(47.1% 0.163 266.6);

Tailwind

colors: {
  custom: {
    50: '#7b81cc',
    500: '#3151b5',
    950: '#000000',
  },
}

SCSS

$custom: #3151b5;
$custom-light: #7b81cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b5",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 181
  },
  "hsl": {
    "h": 225.455,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.47083,
    "c": 0.163,
    "h": 266.6
  },
  "luminance": 0.09874
}

Semantic roles & 50–950 ramp

primary

#3151B5

secondary

#C7B47B

accent

#BB47E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3151B5

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

Preview Lab → · Contrast checker → · Palette generator →