#4051CB#4051CB

#4051CB is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.6% C 0.188 H 271.6°. Best body text is #FFFFFF at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#4051CB
RGB	rgb(64, 81, 203)
HSL	hsl(233, 57%, 52%)
HSV	hsv(233, 68%, 80%)
CMYK	cmyk(68.5%, 60.1%, 0%, 20.4%)
CIE-LAB	lab(40.06, 33.49, -65.32)
CIE-LCH	lch(40.06, 73.40, 297.14°)
OKLab	oklab(49.64% 0.0053 -0.1884)
OKLCH	oklch(49.64% 0.188 271.6)
XYZ	xyz(15.8326, 11.2851, 57.8322)
Luminance	0.1129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4051CB #CBBA40

analogous

#4096CB #4051CB #7540CB

triadic

#4051CB #CB4051 #51CB40

tetradic

#4051CB #CB4096 #CBBA40 #40CB75

square

#4051CB #CB4096 #CBBA40 #40CB75

split-complementary

#4051CB #CB7540 #96CB40

monochromatic

#1F2972 #2C3AA2 #4051CB #707DD8 #A0A9E5

Accessibility & contrast

On white

6.45

#4051CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#4051CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4051CB

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4051CB	#FFFFFF	#000000	##FFFFFF
##4051CB	1.00	6.45	3.26	6.45
#FFFFFF	6.45	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CF

Deuteranopia (green-blind)

#0058C9

Tritanopia (blue-blind)

#007086

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4051cb;
/* rgb */ color: rgb(64, 81, 203);
/* oklch */ color: oklch(49.6% 0.188 271.6);

Tailwind

colors: {
  custom: {
    50: '#8681dc',
    500: '#4051cb',
    950: '#000000',
  },
}

SCSS

$custom: #4051cb;
$custom-light: #8681dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4051cb",
  "rgb": {
    "r": 64,
    "g": 81,
    "b": 203
  },
  "hsl": {
    "h": 232.662,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.49642,
    "c": 0.18843,
    "h": 271.6
  },
  "luminance": 0.11287
}

Semantic roles & 50–950 ramp

primary

#4051CB

secondary

#D2CA95

accent

#CE47E0

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #4051CB

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

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