#3F58BB#3F58BB

#3F58BB is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.7% C 0.158 H 269.2°. Best body text is #FFFFFF at 6.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F58BB
RGB	rgb(63, 88, 187)
HSL	hsl(228, 50%, 49%)
HSV	hsv(228, 66%, 73%)
CMYK	cmyk(66.3%, 52.9%, 0%, 26.7%)
CIE-LAB	lab(40.61, 23.19, -55.12)
CIE-LCH	lch(40.61, 59.80, 292.82°)
OKLab	oklab(49.67% -0.0021 -0.1583)
OKLCH	oklch(49.67% 0.158 269.2)
XYZ	xyz(14.5062, 11.6227, 48.4830)
Luminance	0.1162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58BB #BBA23F

analogous

#3F96BB #3F58BB #643FBB

triadic

#3F58BB #BB3F58 #58BB3F

tetradic

#3F58BB #BB3F96 #BBA23F #3FBB64

square

#3F58BB #BB3F96 #BBA23F #3FBB64

split-complementary

#3F58BB #BB643F #96BB3F

monochromatic

#202D5F #30428D #3F58BB #6A7ECD #98A6DC

Accessibility & contrast

On white

6.32

#3F58BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#3F58BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58BB

6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58BB	#FFFFFF	#000000	##FFFFFF
##3F58BB	1.00	6.32	3.32	6.32
#FFFFFF	6.32	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1766BE

Deuteranopia (green-blind)

#005AB9

Tritanopia (blue-blind)

#006F81

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f58bb;
/* rgb */ color: rgb(63, 88, 187);
/* oklch */ color: oklch(49.7% 0.158 269.2);

Tailwind

colors: {
  custom: {
    50: '#8286d0',
    500: '#3f58bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f58bb;
$custom-light: #8286d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58bb",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 187
  },
  "hsl": {
    "h": 227.903,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.49667,
    "c": 0.15832,
    "h": 269.2
  },
  "luminance": 0.11624
}

Semantic roles & 50–950 ramp

primary

#3F58BB

secondary

#C8BC8E

accent

#BD4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F58BB

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

Preview Lab → · Contrast checker → · Palette generator →