#405BCB#405BCB

#405BCB is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.5% C 0.176 H 269.1°. Best body text is #FFFFFF at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#405BCB
RGB	rgb(64, 91, 203)
HSL	hsl(228, 57%, 52%)
HSV	hsv(228, 68%, 80%)
CMYK	cmyk(68.5%, 55.2%, 0%, 20.4%)
CIE-LAB	lab(42.59, 27.14, -61.21)
CIE-LCH	lch(42.59, 66.95, 293.91°)
OKLab	oklab(51.53% -0.0028 -0.1762)
OKLCH	oklch(51.53% 0.176 269.1)
XYZ	xyz(16.6312, 12.8823, 58.0984)
Luminance	0.1288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#405BCB #CBB040

analogous

#40A1CB #405BCB #6A40CB

triadic

#405BCB #CB405B #5BCB40

tetradic

#405BCB #CB40A1 #CBB040 #40CB6A

square

#405BCB #CB40A1 #CBB040 #40CB6A

split-complementary

#405BCB #CB6A40 #A1CB40

monochromatic

#1F2F72 #2C43A2 #405BCB #7084D8 #A0AEE5

Accessibility & contrast

On white

5.87

#405BCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#405BCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #405BCB

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##405BCB	#FFFFFF	#000000	##FFFFFF
##405BCB	1.00	5.87	3.58	5.87
#FFFFFF	5.87	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BCF

Deuteranopia (green-blind)

#005EC9

Tritanopia (blue-blind)

#00768A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #405bcb;
/* rgb */ color: rgb(64, 91, 203);
/* oklch */ color: oklch(51.5% 0.176 269.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#405bcb",
  "rgb": {
    "r": 64,
    "g": 91,
    "b": 203
  },
  "hsl": {
    "h": 228.345,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.51528,
    "c": 0.17618,
    "h": 269.1
  },
  "luminance": 0.12884
}

Semantic roles & 50–950 ramp

primary

#405BCB

secondary

#D2C695

accent

#C347E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #405BCB

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

Preview Lab → · Contrast checker → · Palette generator →