#4178C9#4178C9

#4178C9 is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.5% C 0.138 H 258.1°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#4178C9
RGB	rgb(65, 120, 201)
HSL	hsl(216, 56%, 52%)
HSV	hsv(216, 68%, 79%)
CMYK	cmyk(67.7%, 40.3%, 0%, 21.2%)
CIE-LAB	lab(50.42, 8.28, -47.47)
CIE-LCH	lch(50.42, 48.18, 279.89°)
OKLab	oklab(57.49% -0.0286 -0.1353)
OKLCH	oklch(57.49% 0.138 258.1)
XYZ	xyz(19.4353, 18.7718, 57.8461)
Luminance	0.1877 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4178C9 #C99241

analogous

#41BCC9 #4178C9 #4E41C9

triadic

#4178C9 #C94178 #78C941

tetradic

#4178C9 #C941BC #C99241 #41C94E

square

#4178C9 #C941BC #C99241 #41C94E

split-complementary

#4178C9 #C94E41 #BCC941

monochromatic

#204070 #2D5B9F #4178C9 #719AD7 #A0BCE4

Accessibility & contrast

On white

4.42

#4178C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#4178C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4178C9

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4178C9	#FFFFFF	#000000	##000000
##4178C9	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#537FCC

Deuteranopia (green-blind)

#3E72C7

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4178c9;
/* rgb */ color: rgb(65, 120, 201);
/* oklch */ color: oklch(57.5% 0.138 258.1);

Tailwind

colors: {
  custom: {
    50: '#849eda',
    500: '#4178c9',
    950: '#000000',
  },
}

SCSS

$custom: #4178c9;
$custom-light: #849eda;
$custom-dark: #000000;

JSON

{
  "hex": "#4178c9",
  "rgb": {
    "r": 65,
    "g": 120,
    "b": 201
  },
  "hsl": {
    "h": 215.735,
    "s": 55.738,
    "l": 52.157
  },
  "oklch": {
    "l": 0.57488,
    "c": 0.13828,
    "h": 258.1
  },
  "luminance": 0.18774
}

Semantic roles & 50–950 ramp

primary

#4178C9

secondary

#D1B995

accent

#A249DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4178C9

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

Preview Lab → · Contrast checker → · Palette generator →