#3F75CA#3F75CA

#3F75CA is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.8% C 0.144 H 259.2°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F75CA
RGB	rgb(63, 117, 202)
HSL	hsl(217, 57%, 52%)
HSV	hsv(217, 69%, 79%)
CMYK	cmyk(68.8%, 42.1%, 0%, 20.8%)
CIE-LAB	lab(49.55, 10.17, -49.43)
CIE-LCH	lch(49.55, 50.47, 281.63°)
OKLab	oklab(56.81% -0.027 -0.1411)
OKLCH	oklch(56.81% 0.144 259.2)
XYZ	xyz(19.0680, 18.0416, 58.3431)
Luminance	0.1804 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75CA #CA943F

analogous

#3FBACA #3F75CA #4F3FCA

triadic

#3F75CA #CA3F75 #75CA3F

tetradic

#3F75CA #CA3FBA #CA943F #3FCA4F

square

#3F75CA #CA3FBA #CA943F #3FCA4F

split-complementary

#3F75CA #CA4F3F #BACA3F

monochromatic

#1F3E70 #2C59A0 #3F75CA #6F97D7 #9FBAE4

Accessibility & contrast

On white

4.56

#3F75CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#3F75CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75CA

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75CA	#FFFFFF	#000000	##000000
##3F75CA	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D7DCD

Deuteranopia (green-blind)

#3670C8

Tritanopia (blue-blind)

#008995

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f75ca;
/* rgb */ color: rgb(63, 117, 202);
/* oklch */ color: oklch(56.8% 0.144 259.2);

Tailwind

colors: {
  custom: {
    50: '#839cda',
    500: '#3f75ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f75ca;
$custom-light: #839cda;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75ca",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 202
  },
  "hsl": {
    "h": 216.691,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.56807,
    "c": 0.1437,
    "h": 259.2
  },
  "luminance": 0.18044
}

Semantic roles & 50–950 ramp

primary

#3F75CA

secondary

#D1B994

accent

#A548E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75CA

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

Preview Lab → · Contrast checker → · Palette generator →