#404C8B#404C8B

#404C8B is a dark, moderate blue. Relative luminance 0.081; OKLCH L 43.8% C 0.104 H 273.2°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#404C8B
RGB	rgb(64, 76, 139)
HSL	hsl(230, 37%, 40%)
HSV	hsv(230, 54%, 55%)
CMYK	cmyk(54%, 45.3%, 0%, 45.5%)
CIE-LAB	lab(34.24, 14.34, -36.66)
CIE-LCH	lch(34.24, 39.36, 291.36°)
OKLab	oklab(43.84% 0.0059 -0.1041)
OKLCH	oklch(43.84% 0.104 273.2)
XYZ	xyz(9.3575, 8.1223, 25.4958)
Luminance	0.0812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#404C8B #8B7F40

analogous

#40728B #404C8B #5A408B

triadic

#404C8B #8B404C #4C8B40

tetradic

#404C8B #8B4072 #8B7F40 #408B5A

square

#404C8B #8B4072 #8B7F40 #408B5A

split-complementary

#404C8B #8B5A40 #728B40

monochromatic

#191E37 #2D3561 #404C8B #5765B2 #818CC5

Accessibility & contrast

On white

8.00

#404C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#404C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #404C8B

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##404C8B	#FFFFFF	#000000	##FFFFFF
##404C8B	1.00	8.00	2.62	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31548D

Deuteranopia (green-blind)

#294E8A

Tritanopia (blue-blind)

#1E5A64

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #404c8b;
/* rgb */ color: rgb(64, 76, 139);
/* oklch */ color: oklch(43.8% 0.104 273.2);

Tailwind

colors: {
  custom: {
    50: '#7a7dad',
    500: '#404c8b',
    950: '#000000',
  },
}

SCSS

$custom: #404c8b;
$custom-light: #7a7dad;
$custom-dark: #000000;

JSON

{
  "hex": "#404c8b",
  "rgb": {
    "r": 64,
    "g": 76,
    "b": 139
  },
  "hsl": {
    "h": 230.4,
    "s": 36.946,
    "l": 39.804
  },
  "oklch": {
    "l": 0.43841,
    "c": 0.10432,
    "h": 273.2
  },
  "luminance": 0.08123
}

Semantic roles & 50–950 ramp

primary

#404C8B

secondary

#AFA678

accent

#BB5BCD

background

#F7F7FA

surface

#EEEEF4

border

#C9C9CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #404C8B

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

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