#3F5BC9#3F5BC9

#3F5BC9 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.3% C 0.174 H 268.7°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BC9
RGB	rgb(63, 91, 201)
HSL	hsl(228, 56%, 52%)
HSV	hsv(228, 69%, 79%)
CMYK	cmyk(68.7%, 54.7%, 0%, 21.2%)
CIE-LAB	lab(42.39, 26.28, -60.37)
CIE-LCH	lch(42.39, 65.84, 293.52°)
OKLab	oklab(51.32% -0.0038 -0.1737)
OKLCH	oklch(51.32% 0.174 268.7)
XYZ	xyz(16.3300, 12.7544, 56.8483)
Luminance	0.1276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BC9 #C9AD3F

analogous

#3FA0C9 #3F5BC9 #683FC9

triadic

#3F5BC9 #C93F5B #5BC93F

tetradic

#3F5BC9 #C93FA0 #C9AD3F #3FC968

square

#3F5BC9 #C93FA0 #C9AD3F #3FC968

split-complementary

#3F5BC9 #C9683F #A0C93F

monochromatic

#1F2F6F #2D449E #3F5BC9 #6F84D6 #9FADE4

Accessibility & contrast

On white

5.91

#3F5BC9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3F5BC9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BC9

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BC9	#FFFFFF	#000000	##FFFFFF
##3F5BC9	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BCD

Deuteranopia (green-blind)

#005EC7

Tritanopia (blue-blind)

#007689

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5bc9;
/* rgb */ color: rgb(63, 91, 201);
/* oklch */ color: oklch(51.3% 0.174 268.7);

Tailwind

colors: {
  custom: {
    50: '#8489da',
    500: '#3f5bc9',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bc9;
$custom-light: #8489da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bc9",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 201
  },
  "hsl": {
    "h": 227.826,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.51323,
    "c": 0.17376,
    "h": 268.7
  },
  "luminance": 0.12756
}

Semantic roles & 50–950 ramp

primary

#3F5BC9

secondary

#D0C494

accent

#C148DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BC9

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

Preview Lab → · Contrast checker → · Palette generator →