#4151CB#4151CB

#4151CB is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.7% C 0.188 H 271.9°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#4151CB
RGB	rgb(65, 81, 203)
HSL	hsl(233, 57%, 53%)
HSV	hsv(233, 68%, 80%)
CMYK	cmyk(68%, 60.1%, 0%, 20.4%)
CIE-LAB	lab(40.11, 33.63, -65.23)
CIE-LCH	lch(40.11, 73.38, 297.27°)
OKLab	oklab(49.7% 0.0063 -0.1881)
OKLCH	oklch(49.7% 0.188 271.9)
XYZ	xyz(15.8983, 11.3190, 57.8353)
Luminance	0.1132 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4151CB #CBBB41

analogous

#4196CB #4151CB #7641CB

triadic

#4151CB #CB4151 #51CB41

tetradic

#4151CB #CB4196 #CBBB41 #41CB76

square

#4151CB #CB4196 #CBBB41 #41CB76

split-complementary

#4151CB #CB7641 #96CB41

monochromatic

#1F2972 #2C3AA2 #4151CB #717DD8 #A1A9E5

Accessibility & contrast

On white

6.43

#4151CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#4151CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4151CB

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4151CB	#FFFFFF	#000000	##FFFFFF
##4151CB	1.00	6.43	3.26	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CF

Deuteranopia (green-blind)

#0058C9

Tritanopia (blue-blind)

#007086

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4151cb;
/* rgb */ color: rgb(65, 81, 203);
/* oklch */ color: oklch(49.7% 0.188 271.9);

Tailwind

colors: {
  custom: {
    50: '#8681dc',
    500: '#4151cb',
    950: '#000000',
  },
}

SCSS

$custom: #4151cb;
$custom-light: #8681dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4151cb",
  "rgb": {
    "r": 65,
    "g": 81,
    "b": 203
  },
  "hsl": {
    "h": 233.043,
    "s": 57.025,
    "l": 52.549
  },
  "oklch": {
    "l": 0.49699,
    "c": 0.18817,
    "h": 271.9
  },
  "luminance": 0.1132
}

Semantic roles & 50–950 ramp

primary

#4151CB

secondary

#D2CB96

accent

#CF48E0

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #4151CB

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

Preview Lab → · Contrast checker → · Palette generator →