#40479B#40479B

#40479B is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.9% C 0.135 H 275.8°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#40479B
RGB	rgb(64, 71, 155)
HSL	hsl(235, 42%, 43%)
HSV	hsv(235, 59%, 61%)
CMYK	cmyk(58.7%, 54.2%, 0%, 39.2%)
CIE-LAB	lab(33.90, 23.14, -46.93)
CIE-LCH	lch(33.90, 52.32, 296.24°)
OKLab	oklab(43.93% 0.0135 -0.1344)
OKLCH	oklch(43.93% 0.135 275.8)
XYZ	xyz(10.2821, 7.9623, 31.9990)
Luminance	0.0796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40479B #9B9440

analogous

#40749B #40479B #67409B

triadic

#40479B #9B4047 #479B40

tetradic

#40479B #9B4074 #9B9440 #409B67

square

#40479B #9B4074 #9B9440 #409B67

split-complementary

#40479B #9B6740 #749B40

monochromatic

#1C1F44 #2E3370 #40479B #5C64BC #888DCE

Accessibility & contrast

On white

8.10

#40479B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#40479B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40479B

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40479B	#FFFFFF	#000000	##FFFFFF
##40479B	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)

#14549E

Deuteranopia (green-blind)

#004C99

Tritanopia (blue-blind)

#035A6A

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #40479b;
/* rgb */ color: rgb(64, 71, 155);
/* oklch */ color: oklch(43.9% 0.135 275.8);

Tailwind

colors: {
  custom: {
    50: '#7d7ab9',
    500: '#40479b',
    950: '#000000',
  },
}

SCSS

$custom: #40479b;
$custom-light: #7d7ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#40479b",
  "rgb": {
    "r": 64,
    "g": 71,
    "b": 155
  },
  "hsl": {
    "h": 235.385,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43925,
    "c": 0.13507,
    "h": 275.8
  },
  "luminance": 0.07963
}

Semantic roles & 50–950 ramp

primary

#40479B

secondary

#B8B47E

accent

#C856D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0911

muted

#7C7B80

Preview Lab

Preview with #40479B

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

Preview Lab → · Contrast checker → · Palette generator →