#4C78BB#4C78BB

#4C78BB is a mid, moderate blue. Relative luminance 0.186; OKLCH L 57.2% C 0.115 H 258.6°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#4C78BB
RGB	rgb(76, 120, 187)
HSL	hsl(216, 45%, 52%)
HSV	hsv(216, 59%, 73%)
CMYK	cmyk(59.4%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(50.16, 5.43, -39.82)
CIE-LCH	lch(50.16, 40.18, 277.77°)
OKLab	oklab(57.18% -0.0228 -0.1127)
OKLCH	oklch(57.18% 0.115 258.6)
XYZ	xyz(18.6635, 18.5557, 49.6021)
Luminance	0.1856 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C78BB #BB8F4C

analogous

#4CB0BB #4C78BB #584CBB

triadic

#4C78BB #BB4C78 #78BB4C

tetradic

#4C78BB #BB4CB0 #BB8F4C #4CBB58

square

#4C78BB #BB4CB0 #BB8F4C #4CBB58

split-complementary

#4C78BB #BB584C #B0BB4C

monochromatic

#274066 #385C92 #4C78BB #7899CC #A5BBDD

Accessibility & contrast

On white

4.46

#4C78BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#4C78BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4C78BB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C78BB	#FFFFFF	#000000	##000000
##4C78BB	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7DBE

Deuteranopia (green-blind)

#4D73BA

Tritanopia (blue-blind)

#008791

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4c78bb;
/* rgb */ color: rgb(76, 120, 187);
/* oklch */ color: oklch(57.2% 0.115 258.6);

Tailwind

colors: {
  custom: {
    50: '#879ed0',
    500: '#4c78bb',
    950: '#000000',
  },
}

SCSS

$custom: #4c78bb;
$custom-light: #879ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#4c78bb",
  "rgb": {
    "r": 76,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 216.216,
    "s": 44.939,
    "l": 51.569
  },
  "oklch": {
    "l": 0.5718,
    "c": 0.11502,
    "h": 258.6
  },
  "luminance": 0.18557
}

Semantic roles & 50–950 ramp

primary

#4C78BB

secondary

#CAB699

accent

#A153D5

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #4C78BB

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

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