#3F54BF#3F54BF

#3F54BF is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.2% C 0.169 H 270.6°. Best body text is #FFFFFF at 6.50:1 contrast (WCAG AA passes).

Color values

HEX	#3F54BF
RGB	rgb(63, 84, 191)
HSL	hsl(230, 50%, 50%)
HSV	hsv(230, 67%, 75%)
CMYK	cmyk(67%, 56%, 0%, 25.1%)
CIE-LAB	lab(39.84, 27.20, -58.70)
CIE-LCH	lch(39.84, 64.69, 294.86°)
OKLab	oklab(49.18% 0.0017 -0.1689)
OKLCH	oklch(49.18% 0.169 270.6)
XYZ	xyz(14.6210, 11.1576, 50.6632)
Luminance	0.1116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54BF #BFAA3F

analogous

#3F94BF #3F54BF #6A3FBF

triadic

#3F54BF #BF3F54 #54BF3F

tetradic

#3F54BF #BF3F94 #BFAA3F #3FBF6A

square

#3F54BF #BF3F94 #BFAA3F #3FBF6A

split-complementary

#3F54BF #BF6A3F #94BF3F

monochromatic

#212C63 #304091 #3F54BF #6D7DCF #9BA6DE

Accessibility & contrast

On white

6.50

#3F54BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#3F54BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54BF

6.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54BF	#FFFFFF	#000000	##FFFFFF
##3F54BF	1.00	6.50	3.23	6.50
#FFFFFF	6.50	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064C3

Deuteranopia (green-blind)

#0058BD

Tritanopia (blue-blind)

#006E81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f54bf;
/* rgb */ color: rgb(63, 84, 191);
/* oklch */ color: oklch(49.2% 0.169 270.6);

Tailwind

colors: {
  custom: {
    50: '#8383d3',
    500: '#3f54bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f54bf;
$custom-light: #8383d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54bf",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 191
  },
  "hsl": {
    "h": 230.156,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.49183,
    "c": 0.16889,
    "h": 270.6
  },
  "luminance": 0.11159
}

Semantic roles & 50–950 ramp

primary

#3F54BF

secondary

#CAC090

accent

#C34EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F54BF

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

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