#4078CC#4078CC

#4078CC is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.6% C 0.143 H 258.4°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4078CC
RGB	rgb(64, 120, 204)
HSL	hsl(216, 58%, 53%)
HSV	hsv(216, 69%, 80%)
CMYK	cmyk(68.6%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.55, 9.19, -48.98)
CIE-LCH	lch(50.55, 49.83, 280.63°)
OKLab	oklab(57.63% -0.0287 -0.1397)
OKLCH	oklch(57.63% 0.143 258.4)
XYZ	xyz(19.7260, 18.8805, 59.7198)
Luminance	0.1888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4078CC #CC9440

analogous

#40BECC #4078CC #4E40CC

triadic

#4078CC #CC4078 #78CC40

tetradic

#4078CC #CC40BE #CC9440 #40CC4E

square

#4078CC #CC40BE #CC9440 #40CC4E

split-complementary

#4078CC #CC4E40 #BECC40

monochromatic

#1F4073 #2C5BA3 #4078CC #709AD9 #A1BCE6

Accessibility & contrast

On white

4.40

#4078CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#4078CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4078CC

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4078CC	#FFFFFF	#000000	##000000
##4078CC	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517FCF

Deuteranopia (green-blind)

#3A72CA

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4078cc;
/* rgb */ color: rgb(64, 120, 204);
/* oklch */ color: oklch(57.6% 0.143 258.4);

Tailwind

colors: {
  custom: {
    50: '#849edc',
    500: '#4078cc',
    950: '#000000',
  },
}

SCSS

$custom: #4078cc;
$custom-light: #849edc;
$custom-dark: #000000;

JSON

{
  "hex": "#4078cc",
  "rgb": {
    "r": 64,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 216,
    "s": 57.851,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5763,
    "c": 0.14266,
    "h": 258.4
  },
  "luminance": 0.18883
}

Semantic roles & 50–950 ramp

primary

#4078CC

secondary

#D2BA95

accent

#A347E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4078CC

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

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