#404B8A#404B8A

#404B8A is a dark, moderate blue. Relative luminance 0.080; OKLCH L 43.6% C 0.104 H 273.8°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#404B8A
RGB	rgb(64, 75, 138)
HSL	hsl(231, 37%, 40%)
HSV	hsv(231, 54%, 54%)
CMYK	cmyk(53.6%, 45.7%, 0%, 45.9%)
CIE-LAB	lab(33.89, 14.66, -36.59)
CIE-LCH	lch(33.89, 39.42, 291.83°)
OKLab	oklab(43.56% 0.007 -0.104)
OKLCH	oklch(43.56% 0.104 273.8)
XYZ	xyz(9.2164, 7.9565, 25.0899)
Luminance	0.0796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#404B8A #8A7F40

analogous

#40708A #404B8A #5A408A

triadic

#404B8A #8A404B #4B8A40

tetradic

#404B8A #8A4070 #8A7F40 #408A5A

square

#404B8A #8A4070 #8A7F40 #408A5A

split-complementary

#404B8A #8A5A40 #708A40

monochromatic

#191E36 #2D3460 #404B8A #5664B1 #808AC4

Accessibility & contrast

On white

8.10

#404B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#404B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #404B8A

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##404B8A	#FFFFFF	#000000	##FFFFFF
##404B8A	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#30538C

Deuteranopia (green-blind)

#284D89

Tritanopia (blue-blind)

#1F5964

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #404b8a;
/* rgb */ color: rgb(64, 75, 138);
/* oklch */ color: oklch(43.6% 0.104 273.8);

Tailwind

colors: {
  custom: {
    50: '#7a7dac',
    500: '#404b8a',
    950: '#000000',
  },
}

SCSS

$custom: #404b8a;
$custom-light: #7a7dac;
$custom-dark: #000000;

JSON

{
  "hex": "#404b8a",
  "rgb": {
    "r": 64,
    "g": 75,
    "b": 138
  },
  "hsl": {
    "h": 231.081,
    "s": 36.634,
    "l": 39.608
  },
  "oklch": {
    "l": 0.43559,
    "c": 0.1042,
    "h": 273.8
  },
  "luminance": 0.07957
}

Semantic roles & 50–950 ramp

primary

#404B8A

secondary

#AFA677

accent

#BC5BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #404B8A

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

Preview Lab → · Contrast checker → · Palette generator →