#3F6ECB#3F6ECB

#3F6ECB is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.4% C 0.153 H 262.4°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3F6ECB
RGB	rgb(63, 110, 203)
HSL	hsl(220, 57%, 52%)
HSV	hsv(220, 69%, 80%)
CMYK	cmyk(69%, 45.8%, 0%, 20.4%)
CIE-LAB	lab(47.65, 14.91, -53.05)
CIE-LCH	lch(47.65, 55.10, 285.70°)
OKLab	oklab(55.36% -0.0203 -0.1519)
OKLCH	oklch(55.36% 0.153 262.4)
XYZ	xyz(18.4015, 16.5185, 58.7070)
Luminance	0.1652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6ECB #CB9C3F

analogous

#3FB4CB #3F6ECB #563FCB

triadic

#3F6ECB #CB3F6E #6ECB3F

tetradic

#3F6ECB #CB3FB4 #CB9C3F #3FCB56

square

#3F6ECB #CB3FB4 #CB9C3F #3FCB56

split-complementary

#3F6ECB #CB563F #B4CB3F

monochromatic

#1F3A71 #2C53A1 #3F6ECB #6F92D8 #9FB7E5

Accessibility & contrast

On white

4.88

#3F6ECB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#3F6ECB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6ECB

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6ECB	#FFFFFF	#000000	##FFFFFF
##3F6ECB	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F78CE

Deuteranopia (green-blind)

#226BC9

Tritanopia (blue-blind)

#008492

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f6ecb;
/* rgb */ color: rgb(63, 110, 203);
/* oklch */ color: oklch(55.4% 0.153 262.4);

Tailwind

colors: {
  custom: {
    50: '#8497db',
    500: '#3f6ecb',
    950: '#000000',
  },
}

SCSS

$custom: #3f6ecb;
$custom-light: #8497db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6ecb",
  "rgb": {
    "r": 63,
    "g": 110,
    "b": 203
  },
  "hsl": {
    "h": 219.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.55362,
    "c": 0.15322,
    "h": 262.4
  },
  "luminance": 0.1652
}

Semantic roles & 50–950 ramp

primary

#3F6ECB

secondary

#D1BD94

accent

#AD47E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F6ECB

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

Preview Lab → · Contrast checker → · Palette generator →