#4173BB#4173BB

#4173BB is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.5% C 0.125 H 257.6°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4173BB
RGB	rgb(65, 115, 187)
HSL	hsl(215, 48%, 49%)
HSV	hsv(215, 65%, 73%)
CMYK	cmyk(65.2%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(48.22, 6.41, -42.92)
CIE-LCH	lch(48.22, 43.39, 278.49°)
OKLab	oklab(55.53% -0.0268 -0.122)
OKLCH	oklch(55.53% 0.125 257.6)
XYZ	xyz(17.2771, 16.9715, 49.3694)
Luminance	0.1697 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4173BB #BB8941

analogous

#41B0BB #4173BB #4C41BB

triadic

#4173BB #BB4173 #73BB41

tetradic

#4173BB #BB41B0 #BB8941 #41BB4C

square

#4173BB #BB41B0 #BB8941 #41BB4C

split-complementary

#4173BB #BB4C41 #B0BB41

monochromatic

#213B60 #31578E #4173BB #6D94CC #9AB5DC

Accessibility & contrast

On white

4.78

#4173BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#4173BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4173BB

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4173BB	#FFFFFF	#000000	##FFFFFF
##4173BB	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5379BE

Deuteranopia (green-blind)

#426DBA

Tritanopia (blue-blind)

#00838E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4173bb;
/* rgb */ color: rgb(65, 115, 187);
/* oklch */ color: oklch(55.5% 0.125 257.6);

Tailwind

colors: {
  custom: {
    50: '#829ad0',
    500: '#4173bb',
    950: '#000000',
  },
}

SCSS

$custom: #4173bb;
$custom-light: #829ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#4173bb",
  "rgb": {
    "r": 65,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 215.41,
    "s": 48.413,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55533,
    "c": 0.12493,
    "h": 257.6
  },
  "luminance": 0.16973
}

Semantic roles & 50–950 ramp

primary

#4173BB

secondary

#C8B190

accent

#A050D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4173BB

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

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