#3F5BB4#3F5BB4

#3F5BB4 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 49.8% C 0.145 H 267.8°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB4
RGB	rgb(63, 91, 180)
HSL	hsl(226, 48%, 48%)
HSV	hsv(226, 65%, 71%)
CMYK	cmyk(65%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(40.95, 18.75, -50.47)
CIE-LCH	lch(40.95, 53.84, 290.38°)
OKLab	oklab(49.77% -0.0057 -0.1446)
OKLCH	oklch(49.77% 0.145 267.8)
XYZ	xyz(14.0264, 11.8329, 44.7160)
Luminance	0.1183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB4 #B4983F

analogous

#3F95B4 #3F5BB4 #5D3FB4

triadic

#3F5BB4 #B43F5B #5BB43F

tetradic

#3F5BB4 #B43F95 #B4983F #3FB45D

square

#3F5BB4 #B43F95 #B4983F #3FB45D

split-complementary

#3F5BB4 #B45D3F #95B43F

monochromatic

#1F2D59 #2F4487 #3F5BB4 #677ECA #94A5DA

Accessibility & contrast

On white

6.24

#3F5BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#3F5BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB4

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB4	#FFFFFF	#000000	##FFFFFF
##3F5BB4	1.00	6.24	3.37	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B66B7

Deuteranopia (green-blind)

#0E5CB2

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5bb4;
/* rgb */ color: rgb(63, 91, 180);
/* oklch */ color: oklch(49.8% 0.145 267.8);

Tailwind

colors: {
  custom: {
    50: '#8089cb',
    500: '#3f5bb4',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb4;
$custom-light: #8089cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb4",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 225.641,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.49774,
    "c": 0.1447,
    "h": 267.8
  },
  "luminance": 0.11834
}

Semantic roles & 50–950 ramp

primary

#3F5BB4

secondary

#C5B78A

accent

#B750D8

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB4

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

Preview Lab → · Contrast checker → · Palette generator →