#4378DD#4378DD

#4378DD is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.8% C 0.164 H 261.9°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#4378DD
RGB	rgb(67, 120, 221)
HSL	hsl(219, 69%, 56%)
HSV	hsv(219, 70%, 87%)
CMYK	cmyk(69.7%, 45.7%, 0%, 13.3%)
CIE-LAB	lab(51.66, 15.71, -56.82)
CIE-LCH	lch(51.66, 58.96, 285.46°)
OKLab	oklab(58.84% -0.0233 -0.1627)
OKLCH	oklch(58.84% 0.164 261.9)
XYZ	xyz(22.0777, 19.8444, 71.0594)
Luminance	0.1985 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4378DD #DDA843

analogous

#43C5DD #4378DD #5B43DD

triadic

#4378DD #DD4378 #78DD43

tetradic

#4378DD #DD43C5 #DDA843 #43DD5B

square

#4378DD #DD43C5 #DDA843 #43DD5B

split-complementary

#4378DD #DD5B43 #C5DD43

monochromatic

#19418C #2359C0 #4378DD #779DE6 #ABC2F0

Accessibility & contrast

On white

4.23

#4378DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#4378DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4378DD

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4378DD	#FFFFFF	#000000	##000000
##4378DD	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4483E1

Deuteranopia (green-blind)

#2475DB

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4378dd;
/* rgb */ color: rgb(67, 120, 221);
/* oklch */ color: oklch(58.8% 0.164 261.9);

Tailwind

colors: {
  custom: {
    50: '#889ee8',
    500: '#4378dd',
    950: '#000000',
  },
}

SCSS

$custom: #4378dd;
$custom-light: #889ee8;
$custom-dark: #000000;

JSON

{
  "hex": "#4378dd",
  "rgb": {
    "r": 67,
    "g": 120,
    "b": 221
  },
  "hsl": {
    "h": 219.351,
    "s": 69.369,
    "l": 56.471
  },
  "oklch": {
    "l": 0.58844,
    "c": 0.16441,
    "h": 261.9
  },
  "luminance": 0.19847
}

Semantic roles & 50–950 ramp

primary

#4378DD

secondary

#DEC89E

accent

#AF3CEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4378DD

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

Preview Lab → · Contrast checker → · Palette generator →