#3151B4#3151B4

#3151B4 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.0% C 0.162 H 266.6°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#3151B4
RGB	rgb(49, 81, 180)
HSL	hsl(225, 57%, 45%)
HSV	hsv(225, 73%, 71%)
CMYK	cmyk(72.8%, 55%, 0%, 29.4%)
CIE-LAB	lab(37.54, 23.12, -56.02)
CIE-LCH	lch(37.54, 60.60, 292.43°)
OKLab	oklab(47% -0.0097 -0.1613)
OKLCH	oklch(47% 0.162 266.6)
XYZ	xyz(12.4444, 9.8318, 44.4131)
Luminance	0.0983 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B4 #B49431

analogous

#3192B4 #3151B4 #5331B4

triadic

#3151B4 #B43151 #51B431

tetradic

#3151B4 #B43192 #B49431 #31B453

square

#3151B4 #B43192 #B49431 #31B453

split-complementary

#3151B4 #B45331 #92B431

monochromatic

#172654 #243B84 #3151B4 #5271D0 #8298DD

Accessibility & contrast

On white

7.08

#3151B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3151B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B4

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B4	#FFFFFF	#000000	##FFFFFF
##3151B4	1.00	7.08	2.97	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB7

Deuteranopia (green-blind)

#0053B2

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3151b4;
/* rgb */ color: rgb(49, 81, 180);
/* oklch */ color: oklch(47.0% 0.162 266.6);

Tailwind

colors: {
  custom: {
    50: '#7b81cb',
    500: '#3151b4',
    950: '#000000',
  },
}

SCSS

$custom: #3151b4;
$custom-light: #7b81cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b4",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 180
  },
  "hsl": {
    "h": 225.344,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.47004,
    "c": 0.16163,
    "h": 266.6
  },
  "luminance": 0.09833
}

Semantic roles & 50–950 ramp

primary

#3151B4

secondary

#C6B47B

accent

#BB47E0

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3151B4

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

Preview Lab → · Contrast checker → · Palette generator →