#4F51CB#4F51CB

#4F51CB is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.6% C 0.185 H 276.8°. Best body text is #FFFFFF at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#4F51CB
RGB	rgb(79, 81, 203)
HSL	hsl(239, 54%, 55%)
HSV	hsv(239, 61%, 80%)
CMYK	cmyk(61.1%, 60.1%, 0%, 20.4%)
CIE-LAB	lab(40.99, 35.76, -63.76)
CIE-LCH	lch(40.99, 73.10, 299.28°)
OKLab	oklab(50.58% 0.0219 -0.1834)
OKLCH	oklch(50.58% 0.185 276.8)
XYZ	xyz(16.9429, 11.8576, 57.8842)
Luminance	0.1186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4F51CB #CBC94F

analogous

#4F8FCB #4F51CB #8B4FCB

triadic

#4F51CB #CB4F51 #51CB4F

tetradic

#4F51CB #CB4F8F #CBC94F #4FCB8B

square

#4F51CB #CB4F8F #CBC94F #4FCB8B

split-complementary

#4F51CB #CB8B4F #8FCB4F

monochromatic

#24267B #3234AA #4F51CB #7E80D9 #ADAEE7

Accessibility & contrast

On white

6.23

#4F51CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#4F51CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4F51CB

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4F51CB	#FFFFFF	#000000	##FFFFFF
##4F51CB	1.00	6.23	3.37	6.23
#FFFFFF	6.23	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066CF

Deuteranopia (green-blind)

#005BC9

Tritanopia (blue-blind)

#006F86

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #4f51cb;
/* rgb */ color: rgb(79, 81, 203);
/* oklch */ color: oklch(50.6% 0.185 276.8);

Tailwind

colors: {
  custom: {
    50: '#8d82dc',
    500: '#4f51cb',
    950: '#000000',
  },
}

SCSS

$custom: #4f51cb;
$custom-light: #8d82dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4f51cb",
  "rgb": {
    "r": 79,
    "g": 81,
    "b": 203
  },
  "hsl": {
    "h": 239.032,
    "s": 54.386,
    "l": 55.294
  },
  "oklch": {
    "l": 0.50576,
    "c": 0.18471,
    "h": 276.8
  },
  "luminance": 0.11859
}

Semantic roles & 50–950 ramp

primary

#4F51CB

secondary

#D5D4A1

accent

#DB4ADE

background

#F9F7FD

surface

#F2EEFB

border

#CCC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4F51CB

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

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