#4178CC#4178CC

#4178CC is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.7% C 0.142 H 258.7°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4178CC
RGB	rgb(65, 120, 204)
HSL	hsl(216, 58%, 53%)
HSV	hsv(216, 68%, 80%)
CMYK	cmyk(68.1%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.59, 9.35, -48.91)
CIE-LCH	lch(50.59, 49.80, 280.82°)
OKLab	oklab(57.67% -0.0279 -0.1395)
OKLCH	oklch(57.67% 0.142 258.7)
XYZ	xyz(19.7916, 18.9144, 59.7228)
Luminance	0.1892 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4178CC #CC9541

analogous

#41BDCC #4178CC #4F41CC

triadic

#4178CC #CC4178 #78CC41

tetradic

#4178CC #CC41BD #CC9541 #41CC4F

square

#4178CC #CC41BD #CC9541 #41CC4F

split-complementary

#4178CC #CC4F41 #BDCC41

monochromatic

#1F4074 #2C5BA4 #4178CC #719AD9 #A1BDE6

Accessibility & contrast

On white

4.39

#4178CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#4178CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4178CC

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4178CC	#FFFFFF	#000000	##000000
##4178CC	1.00	4.39	4.78	4.78
#FFFFFF	4.39	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)

#3B72CA

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4178cc;
/* rgb */ color: rgb(65, 120, 204);
/* oklch */ color: oklch(57.7% 0.142 258.7);

Tailwind

colors: {
  custom: {
    50: '#859edc',
    500: '#4178cc',
    950: '#000000',
  },
}

SCSS

$custom: #4178cc;
$custom-light: #859edc;
$custom-dark: #000000;

JSON

{
  "hex": "#4178cc",
  "rgb": {
    "r": 65,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 216.259,
    "s": 57.676,
    "l": 52.745
  },
  "oklch": {
    "l": 0.57672,
    "c": 0.1423,
    "h": 258.7
  },
  "luminance": 0.18916
}

Semantic roles & 50–950 ramp

primary

#4178CC

secondary

#D3BB96

accent

#A447E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4178CC

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

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