#404E8A#404E8A

#404E8A is a dark, moderate blue. Relative luminance 0.084; OKLCH L 44.2% C 0.100 H 271.9°. Best body text is #FFFFFF at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#404E8A
RGB	rgb(64, 78, 138)
HSL	hsl(229, 37%, 40%)
HSV	hsv(229, 54%, 54%)
CMYK	cmyk(53.6%, 43.5%, 0%, 45.9%)
CIE-LAB	lab(34.75, 12.68, -35.23)
CIE-LCH	lch(34.75, 37.45, 289.80°)
OKLab	oklab(44.21% 0.0033 -0.0999)
OKLCH	oklch(44.21% 0.1 271.9)
XYZ	xyz(9.4247, 8.3731, 25.1594)
Luminance	0.0837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#404E8A #8A7C40

analogous

#40738A #404E8A #57408A

triadic

#404E8A #8A404E #4E8A40

tetradic

#404E8A #8A4073 #8A7C40 #408A57

square

#404E8A #8A4073 #8A7C40 #408A57

split-complementary

#404E8A #8A5740 #738A40

monochromatic

#191F36 #2D3660 #404E8A #5667B1 #808DC4

Accessibility & contrast

On white

7.85

#404E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#404E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #404E8A

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##404E8A	#FFFFFF	#000000	##FFFFFF
##404E8A	1.00	7.85	2.67	7.85
#FFFFFF	7.85	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#35558C

Deuteranopia (green-blind)

#2D4F89

Tritanopia (blue-blind)

#1E5B65

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #404e8a;
/* rgb */ color: rgb(64, 78, 138);
/* oklch */ color: oklch(44.2% 0.100 271.9);

Tailwind

colors: {
  custom: {
    50: '#7a7fac',
    500: '#404e8a',
    950: '#000000',
  },
}

SCSS

$custom: #404e8a;
$custom-light: #7a7fac;
$custom-dark: #000000;

JSON

{
  "hex": "#404e8a",
  "rgb": {
    "r": 64,
    "g": 78,
    "b": 138
  },
  "hsl": {
    "h": 228.649,
    "s": 36.634,
    "l": 39.608
  },
  "oklch": {
    "l": 0.44213,
    "c": 0.1,
    "h": 271.9
  },
  "luminance": 0.08374
}

Semantic roles & 50–950 ramp

primary

#404E8A

secondary

#AFA477

accent

#B75BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0A10

muted

#7C7C7F

Preview Lab

Preview with #404E8A

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

Preview Lab → · Contrast checker → · Palette generator →