#3D78CB#3D78CB

#3D78CB is a mid, vivid blue. Relative luminance 0.187; OKLCH L 57.4% C 0.142 H 257.4°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3D78CB
RGB	rgb(61, 120, 203)
HSL	hsl(215, 58%, 52%)
HSV	hsv(215, 70%, 80%)
CMYK	cmyk(70%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.38, 8.37, -48.69)
CIE-LCH	lch(50.38, 49.40, 279.76°)
OKLab	oklab(57.45% -0.0311 -0.1389)
OKLCH	oklch(57.45% 0.142 257.4)
XYZ	xyz(19.4165, 18.7348, 59.0812)
Luminance	0.1874 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3D78CB #CB903D

analogous

#3DBFCB #3D78CB #493DCB

triadic

#3D78CB #CB3D78 #78CB3D

tetradic

#3D78CB #CB3DBF #CB903D #3DCB49

square

#3D78CB #CB3DBF #CB903D #3DCB49

split-complementary

#3D78CB #CB493D #BFCB3D

monochromatic

#1E4070 #2B5CA0 #3D78CB #6D9AD8 #9EBBE5

Accessibility & contrast

On white

4.42

#3D78CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#3D78CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3D78CB

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3D78CB	#FFFFFF	#000000	##000000
##3D78CB	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517FCE

Deuteranopia (green-blind)

#3A72C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3d78cb;
/* rgb */ color: rgb(61, 120, 203);
/* oklch */ color: oklch(57.4% 0.142 257.4);

Tailwind

colors: {
  custom: {
    50: '#839edb',
    500: '#3d78cb',
    950: '#000000',
  },
}

SCSS

$custom: #3d78cb;
$custom-light: #839edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3d78cb",
  "rgb": {
    "r": 61,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 215.07,
    "s": 57.724,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57447,
    "c": 0.14237,
    "h": 257.4
  },
  "luminance": 0.18737
}

Semantic roles & 50–950 ramp

primary

#3D78CB

secondary

#D1B793

accent

#A147E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3D78CB

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

Preview Lab → · Contrast checker → · Palette generator →