#3F61CB#3F61CB

#3F61CB is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.7% C 0.169 H 267.0°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F61CB
RGB	rgb(63, 97, 203)
HSL	hsl(225, 57%, 52%)
HSV	hsv(225, 69%, 80%)
CMYK	cmyk(69%, 52.2%, 0%, 20.4%)
CIE-LAB	lab(44.11, 23.16, -58.74)
CIE-LCH	lch(44.11, 63.14, 291.52°)
OKLab	oklab(52.67% -0.0088 -0.1688)
OKLCH	oklch(52.67% 0.169 267)
XYZ	xyz(17.1003, 13.9162, 58.2732)
Luminance	0.1392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F61CB #CBA93F

analogous

#3FA7CB #3F61CB #633FCB

triadic

#3F61CB #CB3F61 #61CB3F

tetradic

#3F61CB #CB3FA7 #CBA93F #3FCB63

square

#3F61CB #CB3FA7 #CBA93F #3FCB63

split-complementary

#3F61CB #CB633F #A7CB3F

monochromatic

#1F3371 #2C48A1 #3F61CB #6F89D8 #9FB0E5

Accessibility & contrast

On white

5.55

#3F61CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#3F61CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F61CB

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F61CB	#FFFFFF	#000000	##FFFFFF
##3F61CB	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B6FCF

Deuteranopia (green-blind)

#0062C9

Tritanopia (blue-blind)

#007A8D

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f61cb;
/* rgb */ color: rgb(63, 97, 203);
/* oklch */ color: oklch(52.7% 0.169 267.0);

Tailwind

colors: {
  custom: {
    50: '#848ddc',
    500: '#3f61cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f61cb;
$custom-light: #848ddc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f61cb",
  "rgb": {
    "r": 63,
    "g": 97,
    "b": 203
  },
  "hsl": {
    "h": 225.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.52666,
    "c": 0.16905,
    "h": 267
  },
  "luminance": 0.13918
}

Semantic roles & 50–950 ramp

primary

#3F61CB

secondary

#D1C394

accent

#BB47E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F61CB

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

Preview Lab → · Contrast checker → · Palette generator →