#4278D7#4278D7

#4278D7 is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.4% C 0.157 H 260.8°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#4278D7
RGB	rgb(66, 120, 215)
HSL	hsl(218, 65%, 55%)
HSV	hsv(218, 69%, 84%)
CMYK	cmyk(69.3%, 44.2%, 0%, 15.7%)
CIE-LAB	lab(51.26, 13.42, -54.08)
CIE-LCH	lch(51.26, 55.72, 283.94°)
OKLab	oklab(58.41% -0.0251 -0.1547)
OKLCH	oklch(58.41% 0.157 260.8)
XYZ	xyz(21.2246, 19.4953, 66.9212)
Luminance	0.1950 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278D7 #D7A142

analogous

#42C3D7 #4278D7 #5642D7

triadic

#4278D7 #D74278 #78D742

tetradic

#4278D7 #D742C3 #D7A142 #42D756

square

#4278D7 #D742C3 #D7A142 #42D756

split-complementary

#4278D7 #D75642 #C3D742

monochromatic

#1C4183 #265AB5 #4278D7 #759CE2 #A7C0EC

Accessibility & contrast

On white

4.29

#4278D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#4278D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278D7

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278D7	#FFFFFF	#000000	##000000
##4278D7	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)

#4981DB

Deuteranopia (green-blind)

#2D74D5

Tritanopia (blue-blind)

#008E9D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #4278d7;
/* rgb */ color: rgb(66, 120, 215);
/* oklch */ color: oklch(58.4% 0.157 260.8);

Tailwind

colors: {
  custom: {
    50: '#879ee4',
    500: '#4278d7',
    950: '#000000',
  },
}

SCSS

$custom: #4278d7;
$custom-light: #879ee4;
$custom-dark: #000000;

JSON

{
  "hex": "#4278d7",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 215
  },
  "hsl": {
    "h": 218.255,
    "s": 65.066,
    "l": 55.098
  },
  "oklch": {
    "l": 0.5841,
    "c": 0.15671,
    "h": 260.8
  },
  "luminance": 0.19497
}

Semantic roles & 50–950 ramp

primary

#4278D7

secondary

#DAC39B

accent

#AB40E8

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E15

muted

#7D7E84

Preview Lab

Preview with #4278D7

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

Preview Lab → · Contrast checker → · Palette generator →