#3F55BA#3F55BA

#3F55BA is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.0% C 0.161 H 270.2°. Best body text is #FFFFFF at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#3F55BA
RGB	rgb(63, 85, 186)
HSL	hsl(229, 49%, 49%)
HSV	hsv(229, 66%, 73%)
CMYK	cmyk(66.1%, 54.3%, 0%, 27.1%)
CIE-LAB	lab(39.74, 24.77, -55.94)
CIE-LCH	lch(39.74, 61.18, 293.89°)
OKLab	oklab(48.99% 0.0005 -0.1607)
OKLCH	oklch(48.99% 0.161 270.2)
XYZ	xyz(14.1583, 11.0976, 47.8408)
Luminance	0.1110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55BA #BAA43F

analogous

#3F93BA #3F55BA #673FBA

triadic

#3F55BA #BA3F55 #55BA3F

tetradic

#3F55BA #BA3F93 #BAA43F #3FBA67

square

#3F55BA #BA3F93 #BAA43F #3FBA67

split-complementary

#3F55BA #BA673F #93BA3F

monochromatic

#202B5F #30408C #3F55BA #6A7BCC #97A4DC

Accessibility & contrast

On white

6.52

#3F55BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#3F55BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55BA

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55BA	#FFFFFF	#000000	##FFFFFF
##3F55BA	1.00	6.52	3.22	6.52
#FFFFFF	6.52	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0963BE

Deuteranopia (green-blind)

#0058B8

Tritanopia (blue-blind)

#006D7F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f55ba;
/* rgb */ color: rgb(63, 85, 186);
/* oklch */ color: oklch(49.0% 0.161 270.2);

Tailwind

colors: {
  custom: {
    50: '#8284cf',
    500: '#3f55ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f55ba;
$custom-light: #8284cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55ba",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 186
  },
  "hsl": {
    "h": 229.268,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.48993,
    "c": 0.16075,
    "h": 270.2
  },
  "luminance": 0.11099
}

Semantic roles & 50–950 ramp

primary

#3F55BA

secondary

#C8BD8D

accent

#C04FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F55BA

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

Preview Lab → · Contrast checker → · Palette generator →