#3F5BB0#3F5BB0

#3F5BB0 is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.5% C 0.139 H 267.4°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB0
RGB	rgb(63, 91, 176)
HSL	hsl(225, 47%, 47%)
HSV	hsv(225, 64%, 69%)
CMYK	cmyk(64.2%, 48.3%, 0%, 31%)
CIE-LAB	lab(40.69, 17.32, -48.54)
CIE-LCH	lch(40.69, 51.54, 289.64°)
OKLab	oklab(49.49% -0.0062 -0.1389)
OKLCH	oklch(49.49% 0.139 267.4)
XYZ	xyz(13.6248, 11.6723, 42.6008)
Luminance	0.1167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB0 #B0943F

analogous

#3F94B0 #3F5BB0 #5C3FB0

triadic

#3F5BB0 #B03F5B #5BB03F

tetradic

#3F5BB0 #B03F94 #B0943F #3FB05C

square

#3F5BB0 #B03F94 #B0943F #3FB05C

split-complementary

#3F5BB0 #B05C3F #94B03F

monochromatic

#1F2C56 #2F4483 #3F5BB0 #657DC8 #92A3D8

Accessibility & contrast

On white

6.30

#3F5BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#3F5BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB0

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB0	#FFFFFF	#000000	##FFFFFF
##3F5BB0	1.00	6.30	3.33	6.30
#FFFFFF	6.30	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F65B3

Deuteranopia (green-blind)

#185BAE

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f5bb0;
/* rgb */ color: rgb(63, 91, 176);
/* oklch */ color: oklch(49.5% 0.139 267.4);

Tailwind

colors: {
  custom: {
    50: '#7f89c8',
    500: '#3f5bb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb0;
$custom-light: #7f89c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb0",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 225.133,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.49493,
    "c": 0.13904,
    "h": 267.4
  },
  "luminance": 0.11674
}

Semantic roles & 50–950 ramp

primary

#3F5BB0

secondary

#C3B488

accent

#B651D7

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB0

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

Preview Lab → · Contrast checker → · Palette generator →