#3F5BB2#3F5BB2

#3F5BB2 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 49.6% C 0.142 H 267.6°. Best body text is #FFFFFF at 6.27:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB2
RGB	rgb(63, 91, 178)
HSL	hsl(225, 48%, 47%)
HSV	hsv(225, 65%, 70%)
CMYK	cmyk(64.6%, 48.9%, 0%, 30.2%)
CIE-LAB	lab(40.82, 18.04, -49.51)
CIE-LCH	lch(40.82, 52.69, 290.02°)
OKLab	oklab(49.63% -0.0059 -0.1417)
OKLCH	oklch(49.63% 0.142 267.6)
XYZ	xyz(13.8241, 11.7520, 43.6507)
Luminance	0.1175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB2 #B2963F

analogous

#3F95B2 #3F5BB2 #5C3FB2

triadic

#3F5BB2 #B23F5B #5BB23F

tetradic

#3F5BB2 #B23F95 #B2963F #3FB25C

square

#3F5BB2 #B23F95 #B2963F #3FB25C

split-complementary

#3F5BB2 #B25C3F #95B23F

monochromatic

#1F2D58 #2F4485 #3F5BB2 #667EC9 #93A4D9

Accessibility & contrast

On white

6.27

#3F5BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#3F5BB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB2

6.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB2	#FFFFFF	#000000	##FFFFFF
##3F5BB2	1.00	6.27	3.35	6.27
#FFFFFF	6.27	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D66B5

Deuteranopia (green-blind)

#145BB0

Tritanopia (blue-blind)

#006F7E

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f5bb2;
/* rgb */ color: rgb(63, 91, 178);
/* oklch */ color: oklch(49.6% 0.142 267.6);

Tailwind

colors: {
  custom: {
    50: '#8089ca',
    500: '#3f5bb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb2;
$custom-light: #8089ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb2",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 178
  },
  "hsl": {
    "h": 225.391,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49633,
    "c": 0.14187,
    "h": 267.6
  },
  "luminance": 0.11753
}

Semantic roles & 50–950 ramp

primary

#3F5BB2

secondary

#C4B689

accent

#B650D7

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB2

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

Preview Lab → · Contrast checker → · Palette generator →