#3F5BBD#3F5BBD

#3F5BBD is a mid, vivid blue. Relative luminance 0.122; OKLCH L 50.4% C 0.157 H 268.3°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BBD
RGB	rgb(63, 91, 189)
HSL	hsl(227, 50%, 49%)
HSV	hsv(227, 67%, 74%)
CMYK	cmyk(66.7%, 51.9%, 0%, 25.9%)
CIE-LAB	lab(41.55, 21.98, -54.77)
CIE-LCH	lch(41.55, 59.01, 291.86°)
OKLab	oklab(50.42% -0.0047 -0.1572)
OKLCH	oklch(50.42% 0.157 268.3)
XYZ	xyz(14.9731, 12.2116, 49.7022)
Luminance	0.1221 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BBD #BDA13F

analogous

#3F9ABD #3F5BBD #623FBD

triadic

#3F5BBD #BD3F5B #5BBD3F

tetradic

#3F5BBD #BD3F9A #BDA13F #3FBD62

square

#3F5BBD #BD3F9A #BDA13F #3FBD62

split-complementary

#3F5BBD #BD623F #9ABD3F

monochromatic

#202F61 #30458F #3F5BBD #6B81CE #99A8DD

Accessibility & contrast

On white

6.10

#3F5BBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#3F5BBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BBD

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BBD	#FFFFFF	#000000	##FFFFFF
##3F5BBD	1.00	6.10	3.44	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F68C0

Deuteranopia (green-blind)

#005DBB

Tritanopia (blue-blind)

#007283

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f5bbd;
/* rgb */ color: rgb(63, 91, 189);
/* oklch */ color: oklch(50.4% 0.157 268.3);

Tailwind

colors: {
  custom: {
    50: '#8289d1',
    500: '#3f5bbd',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bbd;
$custom-light: #8289d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bbd",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 189
  },
  "hsl": {
    "h": 226.667,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.50422,
    "c": 0.1573,
    "h": 268.3
  },
  "luminance": 0.12213
}

Semantic roles & 50–950 ramp

primary

#3F5BBD

secondary

#C9BC8F

accent

#BB4EDA

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F5BBD

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

Preview Lab → · Contrast checker → · Palette generator →