#3F5BCA#3F5BCA

#3F5BCA is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.4% C 0.175 H 268.8°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BCA
RGB	rgb(63, 91, 202)
HSL	hsl(228, 57%, 52%)
HSV	hsv(228, 69%, 79%)
CMYK	cmyk(68.8%, 55%, 0%, 20.8%)
CIE-LAB	lab(42.46, 26.64, -60.83)
CIE-LCH	lch(42.46, 66.41, 293.65°)
OKLab	oklab(51.4% -0.0038 -0.1751)
OKLCH	oklch(51.4% 0.175 268.8)
XYZ	xyz(16.4480, 12.8016, 57.4698)
Luminance	0.1280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BCA #CAAE3F

analogous

#3FA0CA #3F5BCA #693FCA

triadic

#3F5BCA #CA3F5B #5BCA3F

tetradic

#3F5BCA #CA3FA0 #CAAE3F #3FCA69

square

#3F5BCA #CA3FA0 #CAAE3F #3FCA69

split-complementary

#3F5BCA #CA693F #A0CA3F

monochromatic

#1F2F70 #2C43A0 #3F5BCA #6F84D7 #9FADE4

Accessibility & contrast

On white

5.90

#3F5BCA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3F5BCA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BCA

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BCA	#FFFFFF	#000000	##FFFFFF
##3F5BCA	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BCE

Deuteranopia (green-blind)

#005EC8

Tritanopia (blue-blind)

#007689

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5bca;
/* rgb */ color: rgb(63, 91, 202);
/* oklch */ color: oklch(51.4% 0.175 268.8);

Tailwind

colors: {
  custom: {
    50: '#8489db',
    500: '#3f5bca',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bca;
$custom-light: #8489db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bca",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 202
  },
  "hsl": {
    "h": 227.914,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.514,
    "c": 0.17511,
    "h": 268.8
  },
  "luminance": 0.12803
}

Semantic roles & 50–950 ramp

primary

#3F5BCA

secondary

#D1C594

accent

#C148E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BCA

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

Preview Lab → · Contrast checker → · Palette generator →