#3F55BF#3F55BF

#3F55BF is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.4% C 0.168 H 270.3°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#3F55BF
RGB	rgb(63, 85, 191)
HSL	hsl(230, 50%, 50%)
HSV	hsv(230, 67%, 75%)
CMYK	cmyk(67%, 55.5%, 0%, 25.1%)
CIE-LAB	lab(40.10, 26.55, -58.27)
CIE-LCH	lch(40.10, 64.04, 294.50°)
OKLab	oklab(49.38% 0.0008 -0.1676)
OKLCH	oklch(49.38% 0.168 270.3)
XYZ	xyz(14.6992, 11.3140, 50.6893)
Luminance	0.1132 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55BF #BFA93F

analogous

#3F95BF #3F55BF #693FBF

triadic

#3F55BF #BF3F55 #55BF3F

tetradic

#3F55BF #BF3F95 #BFA93F #3FBF69

square

#3F55BF #BF3F95 #BFA93F #3FBF69

split-complementary

#3F55BF #BF693F #95BF3F

monochromatic

#212C63 #304191 #3F55BF #6D7DCF #9BA6DE

Accessibility & contrast

On white

6.44

#3F55BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#3F55BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55BF

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55BF	#FFFFFF	#000000	##FFFFFF
##3F55BF	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#006F81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f55bf;
/* rgb */ color: rgb(63, 85, 191);
/* oklch */ color: oklch(49.4% 0.168 270.3);

Tailwind

colors: {
  custom: {
    50: '#8384d3',
    500: '#3f55bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f55bf;
$custom-light: #8384d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55bf",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 191
  },
  "hsl": {
    "h": 229.688,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.49377,
    "c": 0.16763,
    "h": 270.3
  },
  "luminance": 0.11315
}

Semantic roles & 50–950 ramp

primary

#3F55BF

secondary

#CAC090

accent

#C24EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F55BF

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

Preview Lab → · Contrast checker → · Palette generator →