#4178CB#4178CB

#4178CB is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.6% C 0.141 H 258.5°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#4178CB
RGB	rgb(65, 120, 203)
HSL	hsl(216, 57%, 53%)
HSV	hsv(216, 68%, 80%)
CMYK	cmyk(68%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.53, 8.99, -48.43)
CIE-LCH	lch(50.53, 49.26, 280.52°)
OKLab	oklab(57.61% -0.0282 -0.1381)
OKLCH	oklch(57.61% 0.141 258.5)
XYZ	xyz(19.6721, 18.8666, 59.0932)
Luminance	0.1887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4178CB #CB9441

analogous

#41BDCB #4178CB #4F41CB

triadic

#4178CB #CB4178 #78CB41

tetradic

#4178CB #CB41BD #CB9441 #41CB4F

square

#4178CB #CB41BD #CB9441 #41CB4F

split-complementary

#4178CB #CB4F41 #BDCB41

monochromatic

#1F4072 #2C5BA2 #4178CB #719AD8 #A1BCE5

Accessibility & contrast

On white

4.40

#4178CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#4178CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4178CB

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4178CB	#FFFFFF	#000000	##000000
##4178CB	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#527FCE

Deuteranopia (green-blind)

#3C72C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4178cb;
/* rgb */ color: rgb(65, 120, 203);
/* oklch */ color: oklch(57.6% 0.141 258.5);

Tailwind

colors: {
  custom: {
    50: '#849edb',
    500: '#4178cb',
    950: '#000000',
  },
}

SCSS

$custom: #4178cb;
$custom-light: #849edb;
$custom-dark: #000000;

JSON

{
  "hex": "#4178cb",
  "rgb": {
    "r": 65,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 216.087,
    "s": 57.025,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5761,
    "c": 0.14096,
    "h": 258.5
  },
  "luminance": 0.18869
}

Semantic roles & 50–950 ramp

primary

#4178CB

secondary

#D2BA96

accent

#A348E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4178CB

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

Preview Lab → · Contrast checker → · Palette generator →