#3F74CA#3F74CA

#3F74CA is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.6% C 0.145 H 259.6°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F74CA
RGB	rgb(63, 116, 202)
HSL	hsl(217, 57%, 52%)
HSV	hsv(217, 69%, 79%)
CMYK	cmyk(68.8%, 42.6%, 0%, 20.8%)
CIE-LAB	lab(49.26, 10.79, -49.88)
CIE-LCH	lch(49.26, 51.04, 282.21°)
OKLab	oklab(56.59% -0.0261 -0.1425)
OKLCH	oklch(56.59% 0.145 259.6)
XYZ	xyz(18.9521, 17.8099, 58.3045)
Luminance	0.1781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74CA #CA953F

analogous

#3FBACA #3F74CA #4F3FCA

triadic

#3F74CA #CA3F74 #74CA3F

tetradic

#3F74CA #CA3FBA #CA953F #3FCA4F

square

#3F74CA #CA3FBA #CA953F #3FCA4F

split-complementary

#3F74CA #CA4F3F #BACA3F

monochromatic

#1F3E70 #2C58A0 #3F74CA #6F97D7 #9FB9E4

Accessibility & contrast

On white

4.60

#3F74CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3F74CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74CA

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74CA	#FFFFFF	#000000	##FFFFFF
##3F74CA	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7CCD

Deuteranopia (green-blind)

#346FC8

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f74ca;
/* rgb */ color: rgb(63, 116, 202);
/* oklch */ color: oklch(56.6% 0.145 259.6);

Tailwind

colors: {
  custom: {
    50: '#839bda',
    500: '#3f74ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f74ca;
$custom-light: #839bda;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74ca",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 202
  },
  "hsl": {
    "h": 217.122,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.56589,
    "c": 0.14485,
    "h": 259.6
  },
  "luminance": 0.17812
}

Semantic roles & 50–950 ramp

primary

#3F74CA

secondary

#D1BA94

accent

#A648E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F74CA

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

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