#3F6CCB#3F6CCB

#3F6CCB is a mid, vivid blue. Relative luminance 0.161; OKLCH L 54.9% C 0.156 H 263.2°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CCB
RGB	rgb(63, 108, 203)
HSL	hsl(221, 57%, 52%)
HSV	hsv(221, 69%, 80%)
CMYK	cmyk(69%, 46.8%, 0%, 20.4%)
CIE-LAB	lab(47.09, 16.17, -53.93)
CIE-LCH	lch(47.09, 56.30, 286.69°)
OKLab	oklab(54.94% -0.0185 -0.1545)
OKLCH	oklch(54.94% 0.156 263.2)
XYZ	xyz(18.1881, 16.0918, 58.6358)
Luminance	0.1609 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CCB #CB9E3F

analogous

#3FB2CB #3F6CCB #583FCB

triadic

#3F6CCB #CB3F6C #6CCB3F

tetradic

#3F6CCB #CB3FB2 #CB9E3F #3FCB58

square

#3F6CCB #CB3FB2 #CB9E3F #3FCB58

split-complementary

#3F6CCB #CB583F #B2CB3F

monochromatic

#1F3971 #2C51A1 #3F6CCB #6F91D8 #9FB6E5

Accessibility & contrast

On white

4.98

#3F6CCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3F6CCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CCB

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CCB	#FFFFFF	#000000	##FFFFFF
##3F6CCB	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B77CF

Deuteranopia (green-blind)

#1B6AC9

Tritanopia (blue-blind)

#008292

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f6ccb;
/* rgb */ color: rgb(63, 108, 203);
/* oklch */ color: oklch(54.9% 0.156 263.2);

Tailwind

colors: {
  custom: {
    50: '#8495db',
    500: '#3f6ccb',
    950: '#000000',
  },
}

SCSS

$custom: #3f6ccb;
$custom-light: #8495db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6ccb",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 203
  },
  "hsl": {
    "h": 220.714,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.54938,
    "c": 0.15561,
    "h": 263.2
  },
  "luminance": 0.16094
}

Semantic roles & 50–950 ramp

primary

#3F6CCB

secondary

#D1BE94

accent

#AF47E1

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6CCB

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

Preview Lab → · Contrast checker → · Palette generator →