#4040BC#4040BC

#4040BC is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.4% C 0.189 H 275.8°. Best body text is #FFFFFF at 7.84:1 contrast (WCAG AA passes).

Color values

HEX	#4040BC
RGB	rgb(64, 64, 188)
HSL	hsl(240, 49%, 49%)
HSV	hsv(240, 66%, 74%)
CMYK	cmyk(66%, 66%, 0%, 26.3%)
CIE-LAB	lab(34.78, 38.90, -65.20)
CIE-LCH	lch(34.78, 75.92, 300.82°)
OKLab	oklab(45.38% 0.0191 -0.1881)
OKLCH	oklch(45.38% 0.189 275.8)
XYZ	xyz(13.0219, 8.3865, 48.4997)
Luminance	0.0839 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4040BC #BCBC40

analogous

#407EBC #4040BC #7E40BC

triadic

#4040BC #BC4040 #40BC40

tetradic

#4040BC #BC407E #BCBC40 #40BC7E

square

#4040BC #BC407E #BCBC40 #40BC7E

split-complementary

#4040BC #BC7E40 #7EBC40

monochromatic

#212161 #30308E #4040BC #6C6CCD #9A9ADD

Accessibility & contrast

On white

7.84

#4040BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#4040BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040BC

7.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040BC	#FFFFFF	#000000	##FFFFFF
##4040BC	1.00	7.84	2.68	7.84
#FFFFFF	7.84	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C0

Deuteranopia (green-blind)

#004CBA

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4040bc;
/* rgb */ color: rgb(64, 64, 188);
/* oklch */ color: oklch(45.4% 0.189 275.8);

Tailwind

colors: {
  custom: {
    50: '#8475d1',
    500: '#4040bc',
    950: '#000000',
  },
}

SCSS

$custom: #4040bc;
$custom-light: #8475d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4040bc",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 188
  },
  "hsl": {
    "h": 240,
    "s": 49.206,
    "l": 49.412
  },
  "oklch": {
    "l": 0.45381,
    "c": 0.18909,
    "h": 275.8
  },
  "luminance": 0.08388
}

Semantic roles & 50–950 ramp

primary

#4040BC

secondary

#C9C98F

accent

#D94FD9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4040BC

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

Preview Lab → · Contrast checker → · Palette generator →