#40448B#40448B

#40448B is a dark, moderate blue. Relative luminance 0.071; OKLCH L 42.1% C 0.116 H 277.8°. Best body text is #FFFFFF at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#40448B
RGB	rgb(64, 68, 139)
HSL	hsl(237, 37%, 40%)
HSV	hsv(237, 54%, 55%)
CMYK	cmyk(54%, 51.1%, 0%, 45.5%)
CIE-LAB	lab(32.01, 19.62, -40.23)
CIE-LCH	lch(32.01, 44.75, 296.00°)
OKLab	oklab(42.15% 0.0157 -0.1147)
OKLCH	oklch(42.15% 0.116 277.8)
XYZ	xyz(8.8402, 7.0878, 25.3233)
Luminance	0.0709 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40448B #8B8740

analogous

#406A8B #40448B #62408B

triadic

#40448B #8B4044 #448B40

tetradic

#40448B #8B406A #8B8740 #408B62

square

#40448B #8B406A #8B8740 #408B62

split-complementary

#40448B #8B6240 #6A8B40

monochromatic

#191B37 #2D2F61 #40448B #575CB2 #8184C5

Accessibility & contrast

On white

8.69

#40448B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#40448B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40448B

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40448B	#FFFFFF	#000000	##FFFFFF
##40448B	1.00	8.69	2.42	8.69
#FFFFFF	8.69	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224E8E

Deuteranopia (green-blind)

#194889

Tritanopia (blue-blind)

#1F5461

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #40448b;
/* rgb */ color: rgb(64, 68, 139);
/* oklch */ color: oklch(42.1% 0.116 277.8);

Tailwind

colors: {
  custom: {
    50: '#7b77ad',
    500: '#40448b',
    950: '#000000',
  },
}

SCSS

$custom: #40448b;
$custom-light: #7b77ad;
$custom-dark: #000000;

JSON

{
  "hex": "#40448b",
  "rgb": {
    "r": 64,
    "g": 68,
    "b": 139
  },
  "hsl": {
    "h": 236.8,
    "s": 36.946,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42149,
    "c": 0.11576,
    "h": 277.8
  },
  "luminance": 0.07088
}

Semantic roles & 50–950 ramp

primary

#40448B

secondary

#AFAC78

accent

#C75BCD

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #40448B

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

Preview Lab → · Contrast checker → · Palette generator →