#3A78DD#3A78DD

#3A78DD is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.5% C 0.167 H 259.7°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3A78DD
RGB	rgb(58, 120, 221)
HSL	hsl(217, 71%, 55%)
HSV	hsv(217, 74%, 87%)
CMYK	cmyk(73.8%, 45.7%, 0%, 13.3%)
CIE-LAB	lab(51.33, 14.49, -57.38)
CIE-LCH	lch(51.33, 59.18, 284.18°)
OKLab	oklab(58.49% -0.0298 -0.1645)
OKLCH	oklch(58.49% 0.167 259.7)
XYZ	xyz(21.5078, 19.5505, 71.0327)
Luminance	0.1955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A78DD #DD9F3A

analogous

#3ACADD #3A78DD #4E3ADD

triadic

#3A78DD #DD3A78 #78DD3A

tetradic

#3A78DD #DD3ACA #DD9F3A #3ADD4E

square

#3A78DD #DD3ACA #DD9F3A #3ADD4E

split-complementary

#3A78DD #DD4E3A #CADD3A

monochromatic

#174186 #205BBA #3A78DD #6E9CE6 #A2C0EF

Accessibility & contrast

On white

4.28

#3A78DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3A78DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3A78DD

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A78DD	#FFFFFF	#000000	##000000
##3A78DD	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4382E1

Deuteranopia (green-blind)

#1D73DB

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3a78dd;
/* rgb */ color: rgb(58, 120, 221);
/* oklch */ color: oklch(58.5% 0.167 259.7);

Tailwind

colors: {
  custom: {
    50: '#859ee8',
    500: '#3a78dd',
    950: '#000000',
  },
}

SCSS

$custom: #3a78dd;
$custom-light: #859ee8;
$custom-dark: #000000;

JSON

{
  "hex": "#3a78dd",
  "rgb": {
    "r": 58,
    "g": 120,
    "b": 221
  },
  "hsl": {
    "h": 217.178,
    "s": 70.563,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58493,
    "c": 0.16721,
    "h": 259.7
  },
  "luminance": 0.19553
}

Semantic roles & 50–950 ramp

primary

#3A78DD

secondary

#DCC297

accent

#A93AED

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3A78DD

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

Preview Lab → · Contrast checker → · Palette generator →