#4278CD#4278CD

#4278CD is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.143 H 259.2°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#4278CD
RGB	rgb(66, 120, 205)
HSL	hsl(217, 58%, 53%)
HSV	hsv(217, 68%, 80%)
CMYK	cmyk(67.8%, 41.5%, 0%, 19.6%)
CIE-LAB	lab(50.68, 9.86, -49.32)
CIE-LCH	lch(50.68, 50.30, 281.31°)
OKLab	oklab(57.78% -0.027 -0.1407)
OKLCH	oklch(57.78% 0.143 259.2)
XYZ	xyz(19.9787, 18.9969, 60.3596)
Luminance	0.1900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278CD #CD9742

analogous

#42BDCD #4278CD #5142CD

triadic

#4278CD #CD4278 #78CD42

tetradic

#4278CD #CD42BD #CD9742 #42CD51

square

#4278CD #CD42BD #CD9742 #42CD51

split-complementary

#4278CD #CD5142 #BDCD42

monochromatic

#1F4176 #2C5BA6 #4278CD #729BDA #A3BDE7

Accessibility & contrast

On white

4.38

#4278CD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#4278CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278CD

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278CD	#FFFFFF	#000000	##000000
##4278CD	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5080D0

Deuteranopia (green-blind)

#3A73CB

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4278cd;
/* rgb */ color: rgb(66, 120, 205);
/* oklch */ color: oklch(57.8% 0.143 259.2);

Tailwind

colors: {
  custom: {
    50: '#859edd',
    500: '#4278cd',
    950: '#000000',
  },
}

SCSS

$custom: #4278cd;
$custom-light: #859edd;
$custom-dark: #000000;

JSON

{
  "hex": "#4278cd",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 205
  },
  "hsl": {
    "h": 216.691,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.57776,
    "c": 0.14329,
    "h": 259.2
  },
  "luminance": 0.18999
}

Semantic roles & 50–950 ramp

primary

#4278CD

secondary

#D3BC97

accent

#A546E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278CD

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

Preview Lab → · Contrast checker → · Palette generator →