#4040B3#4040B3

#4040B3 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.177 H 276.4°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#4040B3
RGB	rgb(64, 64, 179)
HSL	hsl(240, 47%, 48%)
HSV	hsv(240, 64%, 70%)
CMYK	cmyk(64.2%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(34.00, 35.86, -61.14)
CIE-LCH	lch(34.00, 70.88, 300.39°)
OKLab	oklab(44.58% 0.0199 -0.1762)
OKLCH	oklch(44.58% 0.177 276.4)
XYZ	xyz(12.0818, 8.0105, 43.5486)
Luminance	0.0801 (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

#4040B3 #B3B340

analogous

#4079B3 #4040B3 #7940B3

triadic

#4040B3 #B34040 #40B340

tetradic

#4040B3 #B34079 #B3B340 #40B379

square

#4040B3 #B34079 #B3B340 #40B379

split-complementary

#4040B3 #B37940 #79B340

monochromatic

#202059 #303086 #4040B3 #6767C9 #9494D9

Accessibility & contrast

On white

8.07

#4040B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#4040B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040B3

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040B3	#FFFFFF	#000000	##FFFFFF
##4040B3	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#004BB1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #4040b3;
/* rgb */ color: rgb(64, 64, 179);
/* oklch */ color: oklch(44.6% 0.177 276.4);

Tailwind

colors: {
  custom: {
    50: '#8275cb',
    500: '#4040b3',
    950: '#000000',
  },
}

SCSS

$custom: #4040b3;
$custom-light: #8275cb;
$custom-dark: #000000;

JSON

{
  "hex": "#4040b3",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 240,
    "s": 47.325,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44582,
    "c": 0.17734,
    "h": 276.4
  },
  "luminance": 0.08011
}

Semantic roles & 50–950 ramp

primary

#4040B3

secondary

#C4C48A

accent

#D751D7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4040B3

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

Preview Lab → · Contrast checker → · Palette generator →