#3F5BBF#3F5BBF

#3F5BBF is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.6% C 0.160 H 268.4°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BBF
RGB	rgb(63, 91, 191)
HSL	hsl(227, 50%, 50%)
HSV	hsv(227, 67%, 75%)
CMYK	cmyk(67%, 52.4%, 0%, 25.1%)
CIE-LAB	lab(41.69, 22.69, -55.71)
CIE-LCH	lch(41.69, 60.16, 292.16°)
OKLab	oklab(50.57% -0.0045 -0.16)
OKLCH	oklch(50.57% 0.16 268.4)
XYZ	xyz(15.1917, 12.2991, 50.8535)
Luminance	0.1230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BBF #BFA33F

analogous

#3F9BBF #3F5BBF #633FBF

triadic

#3F5BBF #BF3F5B #5BBF3F

tetradic

#3F5BBF #BF3F9B #BFA33F #3FBF63

square

#3F5BBF #BF3F9B #BFA33F #3FBF63

split-complementary

#3F5BBF #BF633F #9BBF3F

monochromatic

#212F63 #304591 #3F5BBF #6D82CF #9BA9DE

Accessibility & contrast

On white

6.07

#3F5BBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3F5BBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BBF

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BBF	#FFFFFF	#000000	##FFFFFF
##3F5BBF	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B68C3

Deuteranopia (green-blind)

#005DBD

Tritanopia (blue-blind)

#007384

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f5bbf;
/* rgb */ color: rgb(63, 91, 191);
/* oklch */ color: oklch(50.6% 0.160 268.4);

Tailwind

colors: {
  custom: {
    50: '#8289d3',
    500: '#3f5bbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bbf;
$custom-light: #8289d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bbf",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 191
  },
  "hsl": {
    "h": 226.875,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.50569,
    "c": 0.16007,
    "h": 268.4
  },
  "luminance": 0.12301
}

Semantic roles & 50–950 ramp

primary

#3F5BBF

secondary

#CABD90

accent

#BB4EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F5BBF

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

Preview Lab → · Contrast checker → · Palette generator →