#4057CF#4057CF

#4057CF is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.1% C 0.186 H 270.2°. Best body text is #FFFFFF at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#4057CF
RGB	rgb(64, 87, 207)
HSL	hsl(230, 60%, 53%)
HSV	hsv(230, 69%, 81%)
CMYK	cmyk(69.1%, 58%, 0%, 18.8%)
CIE-LAB	lab(41.86, 31.10, -64.69)
CIE-LCH	lch(41.86, 71.78, 295.68°)
OKLab	oklab(51.08% 0.0006 -0.1864)
OKLCH	oklch(51.08% 0.186 270.2)
XYZ	xyz(16.7812, 12.4097, 60.5303)
Luminance	0.1241 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057CF #CFB840

analogous

#409ECF #4057CF #7040CF

triadic

#4057CF #CF4057 #57CF40

tetradic

#4057CF #CF409E #CFB840 #40CF70

square

#4057CF #CF409E #CFB840 #40CF70

split-complementary

#4057CF #CF7040 #9ECF40

monochromatic

#1E2C77 #2A3EA8 #4057CF #7182DB #A2ADE8

Accessibility & contrast

On white

6.03

#4057CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#4057CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057CF

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057CF	#FFFFFF	#000000	##FFFFFF
##4057CF	1.00	6.03	3.48	6.03
#FFFFFF	6.03	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD3

Deuteranopia (green-blind)

#005CCD

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #4057cf;
/* rgb */ color: rgb(64, 87, 207);
/* oklch */ color: oklch(51.1% 0.186 270.2);

Tailwind

colors: {
  custom: {
    50: '#8686df',
    500: '#4057cf',
    950: '#000000',
  },
}

SCSS

$custom: #4057cf;
$custom-light: #8686df;
$custom-dark: #000000;

JSON

{
  "hex": "#4057cf",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 207
  },
  "hsl": {
    "h": 230.35,
    "s": 59.833,
    "l": 53.137
  },
  "oklch": {
    "l": 0.51079,
    "c": 0.18645,
    "h": 270.2
  },
  "luminance": 0.12411
}

Semantic roles & 50–950 ramp

primary

#4057CF

secondary

#D4CA97

accent

#CA45E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #4057CF

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

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