#4173B9#4173B9

#4173B9 is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.4% C 0.122 H 257.1°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#4173B9
RGB	rgb(65, 115, 185)
HSL	hsl(215, 48%, 49%)
HSV	hsv(215, 65%, 73%)
CMYK	cmyk(64.9%, 37.8%, 0%, 27.5%)
CIE-LAB	lab(48.12, 5.70, -41.93)
CIE-LCH	lch(48.12, 42.32, 277.75°)
OKLab	oklab(55.41% -0.0272 -0.1191)
OKLCH	oklch(55.41% 0.122 257.1)
XYZ	xyz(17.0645, 16.8864, 48.2496)
Luminance	0.1689 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4173B9 #B98741

analogous

#41AFB9 #4173B9 #4B41B9

triadic

#4173B9 #B94173 #73B941

tetradic

#4173B9 #B941AF #B98741 #41B94B

square

#4173B9 #B941AF #B98741 #41B94B

split-complementary

#4173B9 #B94B41 #AFB941

monochromatic

#213B5E #31578C #4173B9 #6C94CB #99B5DB

Accessibility & contrast

On white

4.80

#4173B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#4173B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4173B9

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4173B9	#FFFFFF	#000000	##FFFFFF
##4173B9	1.00	4.80	4.38	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5478BC

Deuteranopia (green-blind)

#436DB8

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4173b9;
/* rgb */ color: rgb(65, 115, 185);
/* oklch */ color: oklch(55.4% 0.122 257.1);

Tailwind

colors: {
  custom: {
    50: '#819ace',
    500: '#4173b9',
    950: '#000000',
  },
}

SCSS

$custom: #4173b9;
$custom-light: #819ace;
$custom-dark: #000000;

JSON

{
  "hex": "#4173b9",
  "rgb": {
    "r": 65,
    "g": 115,
    "b": 185
  },
  "hsl": {
    "h": 215,
    "s": 48,
    "l": 49.02
  },
  "oklch": {
    "l": 0.55414,
    "c": 0.12222,
    "h": 257.1
  },
  "luminance": 0.16888
}

Semantic roles & 50–950 ramp

primary

#4173B9

secondary

#C7B08F

accent

#9F50D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #4173B9

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

Preview Lab → · Contrast checker → · Palette generator →