#4040BB#4040BB

#4040BB is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.3% C 0.188 H 275.9°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#4040BB
RGB	rgb(64, 64, 187)
HSL	hsl(240, 49%, 49%)
HSV	hsv(240, 66%, 73%)
CMYK	cmyk(65.8%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.69, 38.56, -64.75)
CIE-LCH	lch(34.69, 75.37, 300.78°)
OKLab	oklab(45.29% 0.0192 -0.1868)
OKLCH	oklch(45.29% 0.188 275.9)
XYZ	xyz(12.9144, 8.3435, 47.9340)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4040BB #BBBB40

analogous

#407EBB #4040BB #7E40BB

triadic

#4040BB #BB4040 #40BB40

tetradic

#4040BB #BB407E #BBBB40 #40BB7E

square

#4040BB #BB407E #BBBB40 #40BB7E

split-complementary

#4040BB #BB7E40 #7EBB40

monochromatic

#212160 #30308D #4040BB #6C6CCD #9999DC

Accessibility & contrast

On white

7.87

#4040BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#4040BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040BB

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040BB	#FFFFFF	#000000	##FFFFFF
##4040BB	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4040bb;
/* rgb */ color: rgb(64, 64, 187);
/* oklch */ color: oklch(45.3% 0.188 275.9);

Tailwind

colors: {
  custom: {
    50: '#8475d0',
    500: '#4040bb',
    950: '#000000',
  },
}

SCSS

$custom: #4040bb;
$custom-light: #8475d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4040bb",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 240,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.45291,
    "c": 0.18779,
    "h": 275.9
  },
  "luminance": 0.08345
}

Semantic roles & 50–950 ramp

primary

#4040BB

secondary

#C8C88F

accent

#D94FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4040BB

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

Preview Lab → · Contrast checker → · Palette generator →