#4040B9#4040B9

#4040B9 is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.1% C 0.185 H 276.0°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#4040B9
RGB	rgb(64, 64, 185)
HSL	hsl(240, 49%, 49%)
HSV	hsv(240, 65%, 73%)
CMYK	cmyk(65.4%, 65.4%, 0%, 27.5%)
CIE-LAB	lab(34.52, 37.89, -63.86)
CIE-LCH	lch(34.52, 74.25, 300.68°)
OKLab	oklab(45.11% 0.0194 -0.1842)
OKLCH	oklch(45.11% 0.185 276)
XYZ	xyz(12.7018, 8.2585, 46.8142)
Luminance	0.0826 (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

#4040B9 #B9B940

analogous

#407DB9 #4040B9 #7D40B9

triadic

#4040B9 #B94040 #40B940

tetradic

#4040B9 #B9407D #B9B940 #40B97D

square

#4040B9 #B9407D #B9B940 #40B97D

split-complementary

#4040B9 #B97D40 #7DB940

monochromatic

#21215E #30308C #4040B9 #6B6BCC #9898DB

Accessibility & contrast

On white

7.92

#4040B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#4040B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040B9

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040B9	#FFFFFF	#000000	##FFFFFF
##4040B9	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BD

Deuteranopia (green-blind)

#004CB7

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #4040b9;
/* rgb */ color: rgb(64, 64, 185);
/* oklch */ color: oklch(45.1% 0.185 276.0);

Tailwind

colors: {
  custom: {
    50: '#8375cf',
    500: '#4040b9',
    950: '#000000',
  },
}

SCSS

$custom: #4040b9;
$custom-light: #8375cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4040b9",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 185
  },
  "hsl": {
    "h": 240,
    "s": 48.594,
    "l": 48.824
  },
  "oklch": {
    "l": 0.45112,
    "c": 0.1852,
    "h": 276
  },
  "luminance": 0.0826
}

Semantic roles & 50–950 ramp

primary

#4040B9

secondary

#C7C78E

accent

#D850D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4040B9

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

Preview Lab → · Contrast checker → · Palette generator →