#3F69B3#3F69B3

#3F69B3 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 52.7% C 0.126 H 260.9°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F69B3
RGB	rgb(63, 105, 179)
HSL	hsl(218, 48%, 47%)
HSV	hsv(218, 65%, 70%)
CMYK	cmyk(64.8%, 41.3%, 0%, 29.8%)
CIE-LAB	lab(44.82, 9.45, -43.69)
CIE-LCH	lch(44.82, 44.70, 282.21°)
OKLab	oklab(52.72% -0.0199 -0.1245)
OKLCH	oklch(52.72% 0.126 260.9)
XYZ	xyz(15.2353, 14.4131, 44.6182)
Luminance	0.1442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F69B3 #B3893F

analogous

#3FA3B3 #3F69B3 #4F3FB3

triadic

#3F69B3 #B33F69 #69B33F

tetradic

#3F69B3 #B33FA3 #B3893F #3FB34F

square

#3F69B3 #B33FA3 #B3893F #3FB34F

split-complementary

#3F69B3 #B34F3F #A3B33F

monochromatic

#1F3458 #2F4E86 #3F69B3 #668AC9 #93ADD9

Accessibility & contrast

On white

5.41

#3F69B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#3F69B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F69B3

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F69B3	#FFFFFF	#000000	##FFFFFF
##3F69B3	1.00	5.41	3.88	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4870B6

Deuteranopia (green-blind)

#3665B1

Tritanopia (blue-blind)

#007A85

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f69b3;
/* rgb */ color: rgb(63, 105, 179);
/* oklch */ color: oklch(52.7% 0.126 260.9);

Tailwind

colors: {
  custom: {
    50: '#8093ca',
    500: '#3f69b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f69b3;
$custom-light: #8093ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f69b3",
  "rgb": {
    "r": 63,
    "g": 105,
    "b": 179
  },
  "hsl": {
    "h": 218.276,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.52724,
    "c": 0.12604,
    "h": 260.9
  },
  "luminance": 0.14415
}

Semantic roles & 50–950 ramp

primary

#3F69B3

secondary

#C4AF89

accent

#A750D8

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3F69B3

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

Preview Lab → · Contrast checker → · Palette generator →