#3F5BB3#3F5BB3

#3F5BB3 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 49.7% C 0.143 H 267.7°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB3
RGB	rgb(63, 91, 179)
HSL	hsl(226, 48%, 47%)
HSV	hsv(226, 65%, 70%)
CMYK	cmyk(64.8%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(40.88, 18.40, -49.99)
CIE-LCH	lch(40.88, 53.27, 290.20°)
OKLab	oklab(49.7% -0.0058 -0.1432)
OKLCH	oklch(49.7% 0.143 267.7)
XYZ	xyz(13.9249, 11.7923, 44.1814)
Luminance	0.1179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB3 #B3973F

analogous

#3F95B3 #3F5BB3 #5D3FB3

triadic

#3F5BB3 #B33F5B #5BB33F

tetradic

#3F5BB3 #B33F95 #B3973F #3FB35D

square

#3F5BB3 #B33F95 #B3973F #3FB35D

split-complementary

#3F5BB3 #B35D3F #95B33F

monochromatic

#1F2D58 #2F4486 #3F5BB3 #667EC9 #93A4D9

Accessibility & contrast

On white

6.25

#3F5BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3F5BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB3

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB3	#FFFFFF	#000000	##FFFFFF
##3F5BB3	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C66B6

Deuteranopia (green-blind)

#115BB1

Tritanopia (blue-blind)

#006F7E

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f5bb3;
/* rgb */ color: rgb(63, 91, 179);
/* oklch */ color: oklch(49.7% 0.143 267.7);

Tailwind

colors: {
  custom: {
    50: '#8089ca',
    500: '#3f5bb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb3;
$custom-light: #8089ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb3",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 225.517,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.49703,
    "c": 0.14329,
    "h": 267.7
  },
  "luminance": 0.11794
}

Semantic roles & 50–950 ramp

primary

#3F5BB3

secondary

#C4B689

accent

#B750D8

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB3

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

Preview Lab → · Contrast checker → · Palette generator →