#40639B#40639B

#40639B is a mid, moderate blue. Relative luminance 0.124; OKLCH L 50.0% C 0.099 H 259.4°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#40639B
RGB	rgb(64, 99, 155)
HSL	hsl(217, 42%, 43%)
HSV	hsv(217, 59%, 61%)
CMYK	cmyk(58.7%, 36.1%, 0%, 39.2%)
CIE-LAB	lab(41.81, 5.01, -34.31)
CIE-LCH	lch(41.81, 34.67, 278.31°)
OKLab	oklab(49.98% -0.0181 -0.097)
OKLCH	oklch(49.98% 0.099 259.4)
XYZ	xyz(12.4905, 12.3792, 32.7352)
Luminance	0.1238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40639B #9B7840

analogous

#40909B #40639B #4A409B

triadic

#40639B #9B4063 #639B40

tetradic

#40639B #9B4090 #9B7840 #409B4A

square

#40639B #9B4090 #9B7840 #409B4A

split-complementary

#40639B #9B4A40 #909B40

monochromatic

#1C2C44 #2E4770 #40639B #5C81BC #88A3CE

Accessibility & contrast

On white

6.04

#40639B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#40639B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #40639B

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40639B	#FFFFFF	#000000	##FFFFFF
##40639B	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C679D

Deuteranopia (green-blind)

#405F9A

Tritanopia (blue-blind)

#007077

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #40639b;
/* rgb */ color: rgb(64, 99, 155);
/* oklch */ color: oklch(50.0% 0.099 259.4);

Tailwind

colors: {
  custom: {
    50: '#7c8fb9',
    500: '#40639b',
    950: '#000000',
  },
}

SCSS

$custom: #40639b;
$custom-light: #7c8fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#40639b",
  "rgb": {
    "r": 64,
    "g": 99,
    "b": 155
  },
  "hsl": {
    "h": 216.923,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.49976,
    "c": 0.09873,
    "h": 259.4
  },
  "luminance": 0.1238
}

Semantic roles & 50–950 ramp

primary

#40639B

secondary

#B8A27E

accent

#A256D1

background

#F7F8FB

surface

#EEF0F6

border

#C9CBD0

text

#0A0C11

muted

#7C7D80

Preview Lab

Preview with #40639B

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

Preview Lab → · Contrast checker → · Palette generator →