#4040AC#4040AC

#4040AC is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.168 H 277.0°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#4040AC
RGB	rgb(64, 64, 172)
HSL	hsl(240, 46%, 46%)
HSV	hsv(240, 63%, 67%)
CMYK	cmyk(62.8%, 62.8%, 0%, 32.5%)
CIE-LAB	lab(33.42, 33.49, -57.92)
CIE-LCH	lch(33.42, 66.91, 300.03°)
OKLab	oklab(43.98% 0.0204 -0.1668)
OKLCH	oklch(43.98% 0.168 277)
XYZ	xyz(11.3917, 7.7344, 39.9143)
Luminance	0.0774 (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

#4040AC #ACAC40

analogous

#4076AC #4040AC #7640AC

triadic

#4040AC #AC4040 #40AC40

tetradic

#4040AC #AC4076 #ACAC40 #40AC76

square

#4040AC #AC4076 #ACAC40 #40AC76

split-complementary

#4040AC #AC7640 #76AC40

monochromatic

#1F1F53 #2F2F7F #4040AC #6464C5 #9191D6

Accessibility & contrast

On white

8.24

#4040AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#4040AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040AC

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040AC	#FFFFFF	#000000	##FFFFFF
##4040AC	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AF

Deuteranopia (green-blind)

#004AAA

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4040ac;
/* rgb */ color: rgb(64, 64, 172);
/* oklch */ color: oklch(44.0% 0.168 277.0);

Tailwind

colors: {
  custom: {
    50: '#8175c6',
    500: '#4040ac',
    950: '#000000',
  },
}

SCSS

$custom: #4040ac;
$custom-light: #8175c6;
$custom-dark: #000000;

JSON

{
  "hex": "#4040ac",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 172
  },
  "hsl": {
    "h": 240,
    "s": 45.763,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43976,
    "c": 0.16802,
    "h": 277
  },
  "luminance": 0.07735
}

Semantic roles & 50–950 ramp

primary

#4040AC

secondary

#C1C187

accent

#D552D5

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #4040AC

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

Preview Lab → · Contrast checker → · Palette generator →