#3378DD#3378DD

#3378DD is a mid, vivid blue. Relative luminance 0.194; OKLCH L 58.3% C 0.169 H 258.3°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3378DD
RGB	rgb(51, 120, 221)
HSL	hsl(216, 71%, 53%)
HSV	hsv(216, 77%, 87%)
CMYK	cmyk(76.9%, 45.7%, 0%, 13.3%)
CIE-LAB	lab(51.10, 13.66, -57.76)
CIE-LCH	lch(51.10, 59.35, 283.31°)
OKLab	oklab(58.26% -0.0343 -0.1657)
OKLCH	oklch(58.26% 0.169 258.3)
XYZ	xyz(21.1281, 19.3547, 71.0149)
Luminance	0.1936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3378DD #DD9833

analogous

#33CDDD #3378DD #4333DD

triadic

#3378DD #DD3378 #78DD33

tetradic

#3378DD #DD33CD #DD9833 #33DD43

square

#3378DD #DD33CD #DD9833 #33DD43

split-complementary

#3378DD #DD4333 #CDDD33

monochromatic

#154180 #1E5BB5 #3378DD #679BE6 #9CBDEE

Accessibility & contrast

On white

4.31

#3378DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#3378DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3378DD

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3378DD	#FFFFFF	#000000	##000000
##3378DD	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4282E1

Deuteranopia (green-blind)

#1873DB

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3378dd;
/* rgb */ color: rgb(51, 120, 221);
/* oklch */ color: oklch(58.3% 0.169 258.3);

Tailwind

colors: {
  custom: {
    50: '#839ee8',
    500: '#3378dd',
    950: '#000000',
  },
}

SCSS

$custom: #3378dd;
$custom-light: #839ee8;
$custom-dark: #000000;

JSON

{
  "hex": "#3378dd",
  "rgb": {
    "r": 51,
    "g": 120,
    "b": 221
  },
  "hsl": {
    "h": 215.647,
    "s": 71.429,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58255,
    "c": 0.16925,
    "h": 258.3
  },
  "luminance": 0.19357
}

Semantic roles & 50–950 ramp

primary

#3378DD

secondary

#DABD91

accent

#A53AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3378DD

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

Preview Lab → · Contrast checker → · Palette generator →