#3F58BC#3F58BC

#3F58BC is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.7% C 0.160 H 269.3°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F58BC
RGB	rgb(63, 88, 188)
HSL	hsl(228, 50%, 49%)
HSV	hsv(228, 66%, 74%)
CMYK	cmyk(66.5%, 53.2%, 0%, 26.3%)
CIE-LAB	lab(40.68, 23.55, -55.59)
CIE-LCH	lch(40.68, 60.37, 292.96°)
OKLab	oklab(49.74% -0.0021 -0.1597)
OKLCH	oklch(49.74% 0.16 269.3)
XYZ	xyz(14.6136, 11.6657, 49.0488)
Luminance	0.1167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58BC #BCA33F

analogous

#3F97BC #3F58BC #653FBC

triadic

#3F58BC #BC3F58 #58BC3F

tetradic

#3F58BC #BC3F97 #BCA33F #3FBC65

square

#3F58BC #BC3F97 #BCA33F #3FBC65

split-complementary

#3F58BC #BC653F #97BC3F

monochromatic

#202D60 #30438E #3F58BC #6B7FCD #99A6DD

Accessibility & contrast

On white

6.30

#3F58BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#3F58BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58BC

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58BC	#FFFFFF	#000000	##FFFFFF
##3F58BC	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)

#1566C0

Deuteranopia (green-blind)

#005ABA

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f58bc;
/* rgb */ color: rgb(63, 88, 188);
/* oklch */ color: oklch(49.7% 0.160 269.3);

Tailwind

colors: {
  custom: {
    50: '#8286d1',
    500: '#3f58bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f58bc;
$custom-light: #8286d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58bc",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 188
  },
  "hsl": {
    "h": 228,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.49742,
    "c": 0.15971,
    "h": 269.3
  },
  "luminance": 0.11667
}

Semantic roles & 50–950 ramp

primary

#3F58BC

secondary

#C9BD8E

accent

#BE4ED9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F58BC

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

Preview Lab → · Contrast checker → · Palette generator →