#3F61BC#3F61BC

#3F61BC is a mid, vivid blue. Relative luminance 0.132; OKLCH L 51.6% C 0.148 H 266.0°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#3F61BC
RGB	rgb(63, 97, 188)
HSL	hsl(224, 50%, 49%)
HSV	hsv(224, 66%, 74%)
CMYK	cmyk(66.5%, 48.4%, 0%, 26.3%)
CIE-LAB	lab(43.12, 17.76, -51.66)
CIE-LCH	lch(43.12, 54.63, 288.97°)
OKLab	oklab(51.59% -0.0104 -0.148)
OKLCH	oklch(51.59% 0.148 266)
XYZ	xyz(15.3985, 13.2355, 49.3104)
Luminance	0.1324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F61BC #BC9A3F

analogous

#3FA0BC #3F61BC #5C3FBC

triadic

#3F61BC #BC3F61 #61BC3F

tetradic

#3F61BC #BC3FA0 #BC9A3F #3FBC5C

square

#3F61BC #BC3FA0 #BC9A3F #3FBC5C

split-complementary

#3F61BC #BC5C3F #A0BC3F

monochromatic

#203260 #30498E #3F61BC #6B86CD #99ABDD

Accessibility & contrast

On white

5.76

#3F61BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#3F61BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F61BC

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F61BC	#FFFFFF	#000000	##FFFFFF
##3F61BC	1.00	5.76	3.65	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316CBF

Deuteranopia (green-blind)

#1360BA

Tritanopia (blue-blind)

#007685

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3f61bc;
/* rgb */ color: rgb(63, 97, 188);
/* oklch */ color: oklch(51.6% 0.148 266.0);

Tailwind

colors: {
  custom: {
    50: '#818dd1',
    500: '#3f61bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f61bc;
$custom-light: #818dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f61bc",
  "rgb": {
    "r": 63,
    "g": 97,
    "b": 188
  },
  "hsl": {
    "h": 223.68,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.5159,
    "c": 0.14838,
    "h": 266
  },
  "luminance": 0.13237
}

Semantic roles & 50–950 ramp

primary

#3F61BC

secondary

#C9B98E

accent

#B44ED9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F61BC

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

Preview Lab → · Contrast checker → · Palette generator →