#3151D3#3151D3

#3151D3 is a mid, highly saturated blue. Relative luminance 0.112; OKLCH L 49.6% C 0.203 H 267.5°. Best body text is #FFFFFF at 6.47:1 contrast (WCAG AA passes).

Color values

HEX	#3151D3
RGB	rgb(49, 81, 211)
HSL	hsl(228, 65%, 51%)
HSV	hsv(228, 77%, 83%)
CMYK	cmyk(76.8%, 61.6%, 0%, 17.3%)
CIE-LAB	lab(39.98, 34.57, -70.09)
CIE-LCH	lch(39.98, 78.15, 296.25°)
OKLab	oklab(49.59% -0.0089 -0.2027)
OKLCH	oklch(49.59% 0.203 267.5)
XYZ	xyz(15.9628, 11.2392, 62.9435)
Luminance	0.1124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151D3 #D3B331

analogous

#31A2D3 #3151D3 #6231D3

triadic

#3151D3 #D33151 #51D331

tetradic

#3151D3 #D331A2 #D3B331 #31D362

square

#3151D3 #D331A2 #D3B331 #31D362

split-complementary

#3151D3 #D36231 #A2D331

monochromatic

#182A71 #233CA4 #3151D3 #637CDE #96A6E9

Accessibility & contrast

On white

6.47

#3151D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#3151D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3151D3

6.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151D3	#FFFFFF	#000000	##FFFFFF
##3151D3	1.00	6.47	3.25	6.47
#FFFFFF	6.47	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D7

Deuteranopia (green-blind)

#0057D1

Tritanopia (blue-blind)

#00738A

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3151d3;
/* rgb */ color: rgb(49, 81, 211);
/* oklch */ color: oklch(49.6% 0.203 267.5);

Tailwind

colors: {
  custom: {
    50: '#8281e2',
    500: '#3151d3',
    950: '#000000',
  },
}

SCSS

$custom: #3151d3;
$custom-light: #8281e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3151d3",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 211
  },
  "hsl": {
    "h": 228.148,
    "s": 64.8,
    "l": 50.98
  },
  "oklch": {
    "l": 0.4959,
    "c": 0.20285,
    "h": 267.5
  },
  "luminance": 0.11241
}

Semantic roles & 50–950 ramp

primary

#3151D3

secondary

#D4C68C

accent

#C740E8

background

#F8F7FE

surface

#F0EEFC

border

#CBC9D5

text

#0C0A15

muted

#7D7C84

Preview Lab

Preview with #3151D3

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

Preview Lab → · Contrast checker → · Palette generator →