#405CCB#405CCB

#405CCB is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.7% C 0.175 H 268.8°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#405CCB
RGB	rgb(64, 92, 203)
HSL	hsl(228, 57%, 52%)
HSV	hsv(228, 68%, 80%)
CMYK	cmyk(68.5%, 54.7%, 0%, 20.4%)
CIE-LAB	lab(42.85, 26.50, -60.79)
CIE-LCH	lch(42.85, 66.31, 293.55°)
OKLab	oklab(51.72% -0.0036 -0.1749)
OKLCH	oklch(51.72% 0.175 268.8)
XYZ	xyz(16.7173, 13.0544, 58.1271)
Luminance	0.1306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#405CCB #CBAF40

analogous

#40A1CB #405CCB #6A40CB

triadic

#405CCB #CB405C #5CCB40

tetradic

#405CCB #CB40A1 #CBAF40 #40CB6A

square

#405CCB #CB40A1 #CBAF40 #40CB6A

split-complementary

#405CCB #CB6A40 #A1CB40

monochromatic

#1F3072 #2C44A2 #405CCB #7085D8 #A0AEE5

Accessibility & contrast

On white

5.82

#405CCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#405CCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #405CCB

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##405CCB	#FFFFFF	#000000	##FFFFFF
##405CCB	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CCF

Deuteranopia (green-blind)

#005FC9

Tritanopia (blue-blind)

#00778A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #405ccb;
/* rgb */ color: rgb(64, 92, 203);
/* oklch */ color: oklch(51.7% 0.175 268.8);

Tailwind

colors: {
  custom: {
    50: '#8589dc',
    500: '#405ccb',
    950: '#000000',
  },
}

SCSS

$custom: #405ccb;
$custom-light: #8589dc;
$custom-dark: #000000;

JSON

{
  "hex": "#405ccb",
  "rgb": {
    "r": 64,
    "g": 92,
    "b": 203
  },
  "hsl": {
    "h": 227.914,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.51723,
    "c": 0.17494,
    "h": 268.8
  },
  "luminance": 0.13056
}

Semantic roles & 50–950 ramp

primary

#405CCB

secondary

#D2C595

accent

#C247E0

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #405CCB

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

Preview Lab → · Contrast checker → · Palette generator →