#3B78DB#3B78DB

#3B78DB is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.4% C 0.164 H 259.7°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3B78DB
RGB	rgb(59, 120, 219)
HSL	hsl(217, 69%, 55%)
HSV	hsv(217, 73%, 86%)
CMYK	cmyk(73.1%, 45.2%, 0%, 14.1%)
CIE-LAB	lab(51.24, 13.89, -56.39)
CIE-LCH	lch(51.24, 58.08, 283.84°)
OKLab	oklab(58.4% -0.0295 -0.1616)
OKLCH	oklch(58.4% 0.164 259.7)
XYZ	xyz(21.3017, 19.4749, 69.6405)
Luminance	0.1948 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B78DB #DB9E3B

analogous

#3BC8DB #3B78DB #4E3BDB

triadic

#3B78DB #DB3B78 #78DB3B

tetradic

#3B78DB #DB3BC8 #DB9E3B #3BDB4E

square

#3B78DB #DB3BC8 #DB9E3B #3BDB4E

split-complementary

#3B78DB #DB4E3B #C8DB3B

monochromatic

#184183 #225BB7 #3B78DB #6F9CE4 #A2BFEE

Accessibility & contrast

On white

4.29

#3B78DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#3B78DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3B78DB

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B78DB	#FFFFFF	#000000	##000000
##3B78DB	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4582DF

Deuteranopia (green-blind)

#2273D9

Tritanopia (blue-blind)

#008F9F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3b78db;
/* rgb */ color: rgb(59, 120, 219);
/* oklch */ color: oklch(58.4% 0.164 259.7);

Tailwind

colors: {
  custom: {
    50: '#859ee7',
    500: '#3b78db',
    950: '#000000',
  },
}

SCSS

$custom: #3b78db;
$custom-light: #859ee7;
$custom-dark: #000000;

JSON

{
  "hex": "#3b78db",
  "rgb": {
    "r": 59,
    "g": 120,
    "b": 219
  },
  "hsl": {
    "h": 217.125,
    "s": 68.966,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58396,
    "c": 0.16427,
    "h": 259.7
  },
  "luminance": 0.19477
}

Semantic roles & 50–950 ramp

primary

#3B78DB

secondary

#DBC197

accent

#A93CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3B78DB

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

Preview Lab → · Contrast checker → · Palette generator →