#3F61BB#3F61BB

#3F61BB is a mid, vivid blue. Relative luminance 0.132; OKLCH L 51.5% C 0.147 H 265.9°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F61BB
RGB	rgb(63, 97, 187)
HSL	hsl(224, 50%, 49%)
HSV	hsv(224, 66%, 73%)
CMYK	cmyk(66.3%, 48.1%, 0%, 26.7%)
CIE-LAB	lab(43.05, 17.40, -51.18)
CIE-LCH	lch(43.05, 54.06, 288.78°)
OKLab	oklab(51.52% -0.0106 -0.1466)
OKLCH	oklch(51.52% 0.147 265.9)
XYZ	xyz(15.2911, 13.1926, 48.7447)
Luminance	0.1319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F61BB #BB993F

analogous

#3F9FBB #3F61BB #5B3FBB

triadic

#3F61BB #BB3F61 #61BB3F

tetradic

#3F61BB #BB3F9F #BB993F #3FBB5B

square

#3F61BB #BB3F9F #BB993F #3FBB5B

split-complementary

#3F61BB #BB5B3F #9FBB3F

monochromatic

#20325F #30498D #3F61BB #6A85CD #98ABDC

Accessibility & contrast

On white

5.77

#3F61BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#3F61BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F61BB

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F61BB	#FFFFFF	#000000	##FFFFFF
##3F61BB	1.00	5.77	3.64	5.77
#FFFFFF	5.77	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326CBE

Deuteranopia (green-blind)

#1660B9

Tritanopia (blue-blind)

#007685

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3f61bb;
/* rgb */ color: rgb(63, 97, 187);
/* oklch */ color: oklch(51.5% 0.147 265.9);

Tailwind

colors: {
  custom: {
    50: '#818dd0',
    500: '#3f61bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f61bb;
$custom-light: #818dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f61bb",
  "rgb": {
    "r": 63,
    "g": 97,
    "b": 187
  },
  "hsl": {
    "h": 223.548,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.51521,
    "c": 0.14698,
    "h": 265.9
  },
  "luminance": 0.13194
}

Semantic roles & 50–950 ramp

primary

#3F61BB

secondary

#C8B88E

accent

#B34FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F61BB

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

Preview Lab → · Contrast checker → · Palette generator →