#3F5BCF#3F5BCF

#3F5BCF is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.8% C 0.182 H 268.9°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BCF
RGB	rgb(63, 91, 207)
HSL	hsl(228, 60%, 53%)
HSV	hsv(228, 70%, 81%)
CMYK	cmyk(69.6%, 56%, 0%, 18.8%)
CIE-LAB	lab(42.83, 28.42, -63.12)
CIE-LCH	lch(42.83, 69.23, 294.24°)
OKLab	oklab(51.79% -0.0035 -0.1818)
OKLCH	oklch(51.79% 0.182 268.9)
XYZ	xyz(17.0496, 13.0422, 60.6383)
Luminance	0.1304 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BCF #CFB33F

analogous

#3FA3CF #3F5BCF #6B3FCF

triadic

#3F5BCF #CF3F5B #5BCF3F

tetradic

#3F5BCF #CF3FA3 #CFB33F #3FCF6B

square

#3F5BCF #CF3FA3 #CFB33F #3FCF6B

split-complementary

#3F5BCF #CF6B3F #A3CF3F

monochromatic

#1E2F76 #2A42A7 #3F5BCF #7085DB #A1AFE7

Accessibility & contrast

On white

5.82

#3F5BCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#3F5BCF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BCF

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BCF	#FFFFFF	#000000	##FFFFFF
##3F5BCF	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CD3

Deuteranopia (green-blind)

#005FCD

Tritanopia (blue-blind)

#00778C

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f5bcf;
/* rgb */ color: rgb(63, 91, 207);
/* oklch */ color: oklch(51.8% 0.182 268.9);

Tailwind

colors: {
  custom: {
    50: '#8589de',
    500: '#3f5bcf',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bcf;
$custom-light: #8589de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bcf",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 207
  },
  "hsl": {
    "h": 228.333,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.51788,
    "c": 0.18184,
    "h": 268.9
  },
  "luminance": 0.13044
}

Semantic roles & 50–950 ramp

primary

#3F5BCF

secondary

#D4C896

accent

#C445E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BCF

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

Preview Lab → · Contrast checker → · Palette generator →