#3F70CC#3F70CC

#3F70CC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.9% C 0.152 H 261.7°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F70CC
RGB	rgb(63, 112, 204)
HSL	hsl(219, 58%, 52%)
HSV	hsv(219, 69%, 80%)
CMYK	cmyk(69.1%, 45.1%, 0%, 20%)
CIE-LAB	lab(48.26, 14.01, -52.63)
CIE-LCH	lch(48.26, 54.46, 284.91°)
OKLab	oklab(55.86% -0.022 -0.1506)
OKLCH	oklch(55.86% 0.152 261.7)
XYZ	xyz(18.7393, 17.0028, 59.4093)
Luminance	0.1701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70CC #CC9B3F

analogous

#3FB7CC #3F70CC #553FCC

triadic

#3F70CC #CC3F70 #70CC3F

tetradic

#3F70CC #CC3FB7 #CC9B3F #3FCC55

square

#3F70CC #CC3FB7 #CC9B3F #3FCC55

split-complementary

#3F70CC #CC553F #B7CC3F

monochromatic

#1E3C72 #2B55A3 #3F70CC #6F94D9 #A0B8E6

Accessibility & contrast

On white

4.77

#3F70CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3F70CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70CC

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70CC	#FFFFFF	#000000	##FFFFFF
##3F70CC	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#427ACF

Deuteranopia (green-blind)

#276DCA

Tritanopia (blue-blind)

#008594

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f70cc;
/* rgb */ color: rgb(63, 112, 204);
/* oklch */ color: oklch(55.9% 0.152 261.7);

Tailwind

colors: {
  custom: {
    50: '#8498dc',
    500: '#3f70cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f70cc;
$custom-light: #8498dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70cc",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 204
  },
  "hsl": {
    "h": 219.149,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.55856,
    "c": 0.15221,
    "h": 261.7
  },
  "luminance": 0.17005
}

Semantic roles & 50–950 ramp

primary

#3F70CC

secondary

#D2BD95

accent

#AB47E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F70CC

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

Preview Lab → · Contrast checker → · Palette generator →