#4073BB#4073BB

#4073BB is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.5% C 0.125 H 257.3°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#4073BB
RGB	rgb(64, 115, 187)
HSL	hsl(215, 49%, 49%)
HSV	hsv(215, 66%, 73%)
CMYK	cmyk(65.8%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(48.18, 6.23, -42.99)
CIE-LCH	lch(48.18, 43.44, 278.25°)
OKLab	oklab(55.49% -0.0276 -0.1222)
OKLCH	oklch(55.49% 0.125 257.3)
XYZ	xyz(17.2115, 16.9376, 49.3663)
Luminance	0.1694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4073BB #BB8840

analogous

#40B1BB #4073BB #4B40BB

triadic

#4073BB #BB4073 #73BB40

tetradic

#4073BB #BB40B1 #BB8840 #40BB4B

square

#4073BB #BB40B1 #BB8840 #40BB4B

split-complementary

#4073BB #BB4B40 #B1BB40

monochromatic

#213B60 #30578D #4073BB #6C94CD #99B5DC

Accessibility & contrast

On white

4.79

#4073BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#4073BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4073BB

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4073BB	#FFFFFF	#000000	##FFFFFF
##4073BB	1.00	4.79	4.39	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5379BE

Deuteranopia (green-blind)

#416DBA

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4073bb;
/* rgb */ color: rgb(64, 115, 187);
/* oklch */ color: oklch(55.5% 0.125 257.3);

Tailwind

colors: {
  custom: {
    50: '#819ad0',
    500: '#4073bb',
    950: '#000000',
  },
}

SCSS

$custom: #4073bb;
$custom-light: #819ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#4073bb",
  "rgb": {
    "r": 64,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 215.122,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55488,
    "c": 0.12532,
    "h": 257.3
  },
  "luminance": 0.16939
}

Semantic roles & 50–950 ramp

primary

#4073BB

secondary

#C8B08F

accent

#A04FD9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4073BB

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

Preview Lab → · Contrast checker → · Palette generator →