#3F5BC8#3F5BC8

#3F5BC8 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.2% C 0.172 H 268.7°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BC8
RGB	rgb(63, 91, 200)
HSL	hsl(228, 55%, 52%)
HSV	hsv(228, 69%, 78%)
CMYK	cmyk(68.5%, 54.5%, 0%, 21.6%)
CIE-LAB	lab(42.32, 25.92, -59.91)
CIE-LCH	lch(42.32, 65.28, 293.40°)
OKLab	oklab(51.25% -0.0039 -0.1724)
OKLCH	oklch(51.25% 0.172 268.7)
XYZ	xyz(16.2127, 12.7075, 56.2308)
Luminance	0.1271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BC8 #C8AC3F

analogous

#3FA0C8 #3F5BC8 #683FC8

triadic

#3F5BC8 #C83F5B #5BC83F

tetradic

#3F5BC8 #C83FA0 #C8AC3F #3FC868

square

#3F5BC8 #C83FA0 #C8AC3F #3FC868

split-complementary

#3F5BC8 #C8683F #A0C83F

monochromatic

#1F2F6D #2D449D #3F5BC8 #6F84D6 #9EACE3

Accessibility & contrast

On white

5.93

#3F5BC8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3F5BC8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BC8

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BC8	#FFFFFF	#000000	##FFFFFF
##3F5BC8	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ACC

Deuteranopia (green-blind)

#005EC6

Tritanopia (blue-blind)

#007588

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5bc8;
/* rgb */ color: rgb(63, 91, 200);
/* oklch */ color: oklch(51.2% 0.172 268.7);

Tailwind

colors: {
  custom: {
    50: '#8489d9',
    500: '#3f5bc8',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bc8;
$custom-light: #8489d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bc8",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 200
  },
  "hsl": {
    "h": 227.737,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.51246,
    "c": 0.1724,
    "h": 268.7
  },
  "luminance": 0.12709
}

Semantic roles & 50–950 ramp

primary

#3F5BC8

secondary

#D0C393

accent

#C049DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BC8

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

Preview Lab → · Contrast checker → · Palette generator →