#4173BC#4173BC

#4173BC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.6% C 0.126 H 257.9°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#4173BC
RGB	rgb(65, 115, 188)
HSL	hsl(216, 49%, 50%)
HSV	hsv(216, 65%, 74%)
CMYK	cmyk(65.4%, 38.8%, 0%, 26.3%)
CIE-LAB	lab(48.28, 6.76, -43.41)
CIE-LCH	lch(48.28, 43.93, 278.85°)
OKLab	oklab(55.59% -0.0265 -0.1235)
OKLCH	oklch(55.59% 0.126 257.9)
XYZ	xyz(17.3846, 17.0144, 49.9351)
Luminance	0.1702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4173BC #BC8A41

analogous

#41B1BC #4173BC #4D41BC

triadic

#4173BC #BC4173 #73BC41

tetradic

#4173BC #BC41B1 #BC8A41 #41BC4D

square

#4173BC #BC41B1 #BC8A41 #41BC4D

split-complementary

#4173BC #BC4D41 #B1BC41

monochromatic

#223B61 #31578F #4173BC #6E94CD #9BB6DC

Accessibility & contrast

On white

4.77

#4173BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#4173BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4173BC

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4173BC	#FFFFFF	#000000	##FFFFFF
##4173BC	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5379BF

Deuteranopia (green-blind)

#416DBB

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4173bc;
/* rgb */ color: rgb(65, 115, 188);
/* oklch */ color: oklch(55.6% 0.126 257.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#4173bc",
  "rgb": {
    "r": 65,
    "g": 115,
    "b": 188
  },
  "hsl": {
    "h": 215.61,
    "s": 48.617,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55593,
    "c": 0.12629,
    "h": 257.9
  },
  "luminance": 0.17016
}

Semantic roles & 50–950 ramp

primary

#4173BC

secondary

#C9B290

accent

#A150D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4173BC

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

Preview Lab → · Contrast checker → · Palette generator →