#3151B7#3151B7

#3151B7 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.2% C 0.166 H 266.7°. Best body text is #FFFFFF at 7.02:1 contrast (WCAG AA passes).

Color values

HEX	#3151B7
RGB	rgb(49, 81, 183)
HSL	hsl(226, 58%, 45%)
HSV	hsv(226, 73%, 72%)
CMYK	cmyk(73.2%, 55.7%, 0%, 28.2%)
CIE-LAB	lab(37.76, 24.24, -57.42)
CIE-LCH	lch(37.76, 62.33, 292.89°)
OKLab	oklab(47.24% -0.0095 -0.1655)
OKLCH	oklch(47.24% 0.166 266.7)
XYZ	xyz(12.7533, 9.9554, 46.0400)
Luminance	0.0996 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B7 #B79731

analogous

#3194B7 #3151B7 #5431B7

triadic

#3151B7 #B73151 #51B731

tetradic

#3151B7 #B73194 #B79731 #31B754

square

#3151B7 #B73194 #B79731 #31B754

split-complementary

#3151B7 #B75431 #94B731

monochromatic

#172656 #243C87 #3151B7 #5472D1 #849ADE

Accessibility & contrast

On white

7.02

#3151B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#3151B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B7

7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B7	#FFFFFF	#000000	##FFFFFF
##3151B7	1.00	7.02	2.99	7.02
#FFFFFF	7.02	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBB

Deuteranopia (green-blind)

#0053B5

Tritanopia (blue-blind)

#006A7C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3151b7;
/* rgb */ color: rgb(49, 81, 183);
/* oklch */ color: oklch(47.2% 0.166 266.7);

Tailwind

colors: {
  custom: {
    50: '#7b81cd',
    500: '#3151b7',
    950: '#000000',
  },
}

SCSS

$custom: #3151b7;
$custom-light: #7b81cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b7",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 183
  },
  "hsl": {
    "h": 225.672,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.47242,
    "c": 0.16574,
    "h": 266.7
  },
  "luminance": 0.09957
}

Semantic roles & 50–950 ramp

primary

#3151B7

secondary

#C8B67C

accent

#BC47E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3151B7

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

Preview Lab → · Contrast checker → · Palette generator →