#3F5CCB#3F5CCB

#3F5CCB is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.7% C 0.175 H 268.5°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F5CCB
RGB	rgb(63, 92, 203)
HSL	hsl(228, 57%, 52%)
HSV	hsv(228, 69%, 80%)
CMYK	cmyk(69%, 54.7%, 0%, 20.4%)
CIE-LAB	lab(42.80, 26.35, -60.87)
CIE-LCH	lch(42.80, 66.33, 293.41°)
OKLab	oklab(51.67% -0.0045 -0.1752)
OKLCH	oklch(51.67% 0.175 268.5)
XYZ	xyz(16.6528, 13.0212, 58.1241)
Luminance	0.1302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5CCB #CBAE3F

analogous

#3FA2CB #3F5CCB #683FCB

triadic

#3F5CCB #CB3F5C #5CCB3F

tetradic

#3F5CCB #CB3FA2 #CBAE3F #3FCB68

square

#3F5CCB #CB3FA2 #CBAE3F #3FCB68

split-complementary

#3F5CCB #CB683F #A2CB3F

monochromatic

#1F3071 #2C44A1 #3F5CCB #6F85D8 #9FAEE5

Accessibility & contrast

On white

5.83

#3F5CCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#3F5CCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5CCB

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5CCB	#FFFFFF	#000000	##FFFFFF
##3F5CCB	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CCF

Deuteranopia (green-blind)

#005FC9

Tritanopia (blue-blind)

#00778A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f5ccb;
/* rgb */ color: rgb(63, 92, 203);
/* oklch */ color: oklch(51.7% 0.175 268.5);

Tailwind

colors: {
  custom: {
    50: '#8589dc',
    500: '#3f5ccb',
    950: '#000000',
  },
}

SCSS

$custom: #3f5ccb;
$custom-light: #8589dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5ccb",
  "rgb": {
    "r": 63,
    "g": 92,
    "b": 203
  },
  "hsl": {
    "h": 227.571,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51672,
    "c": 0.17523,
    "h": 268.5
  },
  "luminance": 0.13023
}

Semantic roles & 50–950 ramp

primary

#3F5CCB

secondary

#D1C594

accent

#C147E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5CCB

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

Preview Lab → · Contrast checker → · Palette generator →