#3F70BA#3F70BA

#3F70BA is a mid, vivid blue. Relative luminance 0.162; OKLCH L 54.7% C 0.128 H 258.5°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F70BA
RGB	rgb(63, 112, 186)
HSL	hsl(216, 49%, 49%)
HSV	hsv(216, 66%, 73%)
CMYK	cmyk(66.1%, 39.8%, 0%, 27.1%)
CIE-LAB	lab(47.22, 7.56, -43.94)
CIE-LCH	lch(47.22, 44.58, 279.77°)
OKLab	oklab(54.71% -0.0255 -0.1251)
OKLCH	oklch(54.71% 0.128 258.5)
XYZ	xyz(16.7038, 16.1886, 48.6893)
Luminance	0.1619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70BA #BA893F

analogous

#3FAEBA #3F70BA #4C3FBA

triadic

#3F70BA #BA3F70 #70BA3F

tetradic

#3F70BA #BA3FAE #BA893F #3FBA4C

square

#3F70BA #BA3FAE #BA893F #3FBA4C

split-complementary

#3F70BA #BA4C3F #AEBA3F

monochromatic

#20395F #30548C #3F70BA #6A91CC #97B3DC

Accessibility & contrast

On white

4.96

#3F70BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3F70BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70BA

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70BA	#FFFFFF	#000000	##FFFFFF
##3F70BA	1.00	4.96	4.24	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F76BD

Deuteranopia (green-blind)

#3C6BB8

Tritanopia (blue-blind)

#00818C

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f70ba;
/* rgb */ color: rgb(63, 112, 186);
/* oklch */ color: oklch(54.7% 0.128 258.5);

Tailwind

colors: {
  custom: {
    50: '#8198cf',
    500: '#3f70ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f70ba;
$custom-light: #8198cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70ba",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 186
  },
  "hsl": {
    "h": 216.098,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.54712,
    "c": 0.12767,
    "h": 258.5
  },
  "luminance": 0.1619
}

Semantic roles & 50–950 ramp

primary

#3F70BA

secondary

#C8B08D

accent

#A24FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3F70BA

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

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