#4040A3#4040A3

#4040A3 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.2% C 0.156 H 277.7°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#4040A3
RGB	rgb(64, 64, 163)
HSL	hsl(240, 44%, 45%)
HSV	hsv(240, 61%, 64%)
CMYK	cmyk(60.7%, 60.7%, 0%, 36.1%)
CIE-LAB	lab(32.70, 30.42, -53.70)
CIE-LCH	lch(32.70, 61.72, 299.53°)
OKLab	oklab(43.22% 0.0208 -0.1544)
OKLCH	oklch(43.22% 0.156 277.7)
XYZ	xyz(10.5565, 7.4003, 35.5153)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.11

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4040A3 #A3A340

analogous

#4072A3 #4040A3 #7240A3

triadic

#4040A3 #A34040 #40A340

tetradic

#4040A3 #A34072 #A3A340 #40A372

square

#4040A3 #A34072 #A3A340 #40A372

split-complementary

#4040A3 #A37240 #72A340

monochromatic

#1D1D4B #2F2F77 #4040A3 #6060C0 #8C8CD2

Accessibility & contrast

On white

8.47

#4040A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#4040A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040A3

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040A3	#FFFFFF	#000000	##FFFFFF
##4040A3	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A6

Deuteranopia (green-blind)

#0049A1

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4040a3;
/* rgb */ color: rgb(64, 64, 163);
/* oklch */ color: oklch(43.2% 0.156 277.7);

Tailwind

colors: {
  custom: {
    50: '#7f75bf',
    500: '#4040a3',
    950: '#000000',
  },
}

SCSS

$custom: #4040a3;
$custom-light: #7f75bf;
$custom-dark: #000000;

JSON

{
  "hex": "#4040a3",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 163
  },
  "hsl": {
    "h": 240,
    "s": 43.612,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43219,
    "c": 0.15577,
    "h": 277.7
  },
  "luminance": 0.07401
}

Semantic roles & 50–950 ramp

primary

#4040A3

secondary

#BDBD82

accent

#D354D3

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #4040A3

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

Preview Lab → · Contrast checker → · Palette generator →