#404E9B#404E9B

#404E9B is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.4% C 0.125 H 272.7°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#404E9B
RGB	rgb(64, 78, 155)
HSL	hsl(231, 42%, 43%)
HSV	hsv(231, 59%, 61%)
CMYK	cmyk(58.7%, 49.7%, 0%, 39.2%)
CIE-LAB	lab(35.80, 18.55, -43.88)
CIE-LCH	lch(35.80, 47.64, 292.92°)
OKLab	oklab(45.35% 0.0059 -0.1253)
OKLCH	oklch(45.35% 0.125 272.7)
XYZ	xyz(10.7532, 8.9045, 32.1561)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#404E9B #9B8D40

analogous

#407C9B #404E9B #5F409B

triadic

#404E9B #9B404E #4E9B40

tetradic

#404E9B #9B407C #9B8D40 #409B5F

square

#404E9B #9B407C #9B8D40 #409B5F

split-complementary

#404E9B #9B5F40 #7C9B40

monochromatic

#1C2244 #2E3870 #404E9B #5C6BBC #8892CE

Accessibility & contrast

On white

7.55

#404E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#404E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #404E9B

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##404E9B	#FFFFFF	#000000	##FFFFFF
##404E9B	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28589E

Deuteranopia (green-blind)

#195099

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #404e9b;
/* rgb */ color: rgb(64, 78, 155);
/* oklch */ color: oklch(45.4% 0.125 272.7);

Tailwind

colors: {
  custom: {
    50: '#7d7fb9',
    500: '#404e9b',
    950: '#000000',
  },
}

SCSS

$custom: #404e9b;
$custom-light: #7d7fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#404e9b",
  "rgb": {
    "r": 64,
    "g": 78,
    "b": 155
  },
  "hsl": {
    "h": 230.769,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45354,
    "c": 0.12548,
    "h": 272.7
  },
  "luminance": 0.08905
}

Semantic roles & 50–950 ramp

primary

#404E9B

secondary

#B8AF7E

accent

#BE56D1

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #404E9B

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

Preview Lab → · Contrast checker → · Palette generator →