#403FBF#403FBF

#403FBF is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.5% C 0.194 H 275.8°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#403FBF
RGB	rgb(64, 63, 191)
HSL	hsl(240, 50%, 50%)
HSV	hsv(240, 67%, 75%)
CMYK	cmyk(66.5%, 67%, 0%, 25.1%)
CIE-LAB	lab(34.81, 40.51, -66.90)
CIE-LCH	lch(34.81, 78.21, 301.20°)
OKLab	oklab(45.49% 0.0195 -0.1931)
OKLCH	oklch(45.49% 0.194 275.8)
XYZ	xyz(13.2927, 8.4054, 50.2020)
Luminance	0.0841 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.50

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FBF #BEBF3F

analogous

#3F7EBF #403FBF #803FBF

triadic

#403FBF #BF403F #3FBF40

tetradic

#403FBF #BF3F7E #BEBF3F #3FBF80

square

#403FBF #BF3F7E #BEBF3F #3FBF80

split-complementary

#403FBF #BF803F #7EBF3F

monochromatic

#212163 #313091 #403FBF #6D6DCF #9B9BDE

Accessibility & contrast

On white

7.83

#403FBF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#403FBF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FBF

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FBF	#FFFFFF	#000000	##FFFFFF
##403FBF	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C3

Deuteranopia (green-blind)

#004CBD

Tritanopia (blue-blind)

#00617A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #403fbf;
/* rgb */ color: rgb(64, 63, 191);
/* oklch */ color: oklch(45.5% 0.194 275.8);

Tailwind

colors: {
  custom: {
    50: '#8575d3',
    500: '#403fbf',
    950: '#000000',
  },
}

SCSS

$custom: #403fbf;
$custom-light: #8575d3;
$custom-dark: #000000;

JSON

{
  "hex": "#403fbf",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 191
  },
  "hsl": {
    "h": 240.469,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.4549,
    "c": 0.19408,
    "h": 275.8
  },
  "luminance": 0.08407
}

Semantic roles & 50–950 ramp

primary

#403FBF

secondary

#C9CA90

accent

#DA4ED9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #403FBF

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

Preview Lab → · Contrast checker → · Palette generator →