#3D51BB#3D51BB

#3D51BB is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.2% C 0.168 H 270.7°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#3D51BB
RGB	rgb(61, 81, 187)
HSL	hsl(230, 51%, 49%)
HSV	hsv(230, 67%, 73%)
CMYK	cmyk(67.4%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(38.66, 27.40, -58.28)
CIE-LCH	lch(38.66, 64.40, 295.18°)
OKLab	oklab(48.17% 0.0021 -0.1677)
OKLCH	oklch(48.17% 0.168 270.7)
XYZ	xyz(13.8335, 10.4635, 48.2947)
Luminance	0.1047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3D51BB #BBA73D

analogous

#3D90BB #3D51BB #683DBB

triadic

#3D51BB #BB3D51 #51BB3D

tetradic

#3D51BB #BB3D90 #BBA73D #3DBB68

square

#3D51BB #BB3D90 #BBA73D #3DBB68

split-complementary

#3D51BB #BB683D #90BB3D

monochromatic

#1F295F #2E3D8D #3D51BB #6878CE #96A1DD

Accessibility & contrast

On white

6.79

#3D51BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3D51BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3D51BB

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3D51BB	#FFFFFF	#000000	##FFFFFF
##3D51BB	1.00	6.79	3.09	6.79
#FFFFFF	6.79	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BF

Deuteranopia (green-blind)

#0056B9

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3d51bb;
/* rgb */ color: rgb(61, 81, 187);
/* oklch */ color: oklch(48.2% 0.168 270.7);

Tailwind

colors: {
  custom: {
    50: '#8181d0',
    500: '#3d51bb',
    950: '#000000',
  },
}

SCSS

$custom: #3d51bb;
$custom-light: #8181d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3d51bb",
  "rgb": {
    "r": 61,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 230.476,
    "s": 50.806,
    "l": 48.627
  },
  "oklch": {
    "l": 0.48174,
    "c": 0.16775,
    "h": 270.7
  },
  "luminance": 0.10465
}

Semantic roles & 50–950 ramp

primary

#3D51BB

secondary

#C8BF8C

accent

#C44EDA

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3D51BB

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

Preview Lab → · Contrast checker → · Palette generator →