#3F5BCE#3F5BCE

#3F5BCE is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.7% C 0.180 H 268.9°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BCE
RGB	rgb(63, 91, 206)
HSL	hsl(228, 59%, 53%)
HSV	hsv(228, 69%, 81%)
CMYK	cmyk(69.4%, 55.8%, 0%, 19.2%)
CIE-LAB	lab(42.75, 28.07, -62.67)
CIE-LCH	lch(42.75, 68.66, 294.13°)
OKLab	oklab(51.71% -0.0036 -0.1805)
OKLCH	oklch(51.71% 0.181 268.9)
XYZ	xyz(16.9277, 12.9935, 59.9964)
Luminance	0.1300 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BCE #CEB23F

analogous

#3FA2CE #3F5BCE #6B3FCE

triadic

#3F5BCE #CE3F5B #5BCE3F

tetradic

#3F5BCE #CE3FA2 #CEB23F #3FCE6B

square

#3F5BCE #CE3FA2 #CEB23F #3FCE6B

split-complementary

#3F5BCE #CE6B3F #A2CE3F

monochromatic

#1E2F75 #2A42A6 #3F5BCE #7085DA #A1AEE7

Accessibility & contrast

On white

5.83

#3F5BCE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#3F5BCE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BCE

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BCE	#FFFFFF	#000000	##FFFFFF
##3F5BCE	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CD2

Deuteranopia (green-blind)

#005FCC

Tritanopia (blue-blind)

#00778B

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f5bce;
/* rgb */ color: rgb(63, 91, 206);
/* oklch */ color: oklch(51.7% 0.180 268.9);

Tailwind

colors: {
  custom: {
    50: '#8589de',
    500: '#3f5bce',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bce;
$custom-light: #8589de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bce",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 206
  },
  "hsl": {
    "h": 228.252,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.5171,
    "c": 0.1805,
    "h": 268.9
  },
  "luminance": 0.12995
}

Semantic roles & 50–950 ramp

primary

#3F5BCE

secondary

#D3C795

accent

#C445E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BCE

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

Preview Lab → · Contrast checker → · Palette generator →