#3F74BE#3F74BE

#3F74BE is a mid, vivid cyan. Relative luminance 0.173; OKLCH L 55.8% C 0.129 H 257.1°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F74BE
RGB	rgb(63, 116, 190)
HSL	hsl(215, 50%, 50%)
HSV	hsv(215, 67%, 75%)
CMYK	cmyk(66.8%, 38.9%, 0%, 25.5%)
CIE-LAB	lab(48.59, 6.51, -44.07)
CIE-LCH	lch(48.59, 44.55, 278.40°)
OKLab	oklab(55.85% -0.0287 -0.1254)
OKLCH	oklch(55.85% 0.129 257.1)
XYZ	xyz(17.5862, 17.2635, 51.1106)
Luminance	0.1726 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74BE #BE893F

analogous

#3FB4BE #3F74BE #4A3FBE

triadic

#3F74BE #BE3F74 #74BE3F

tetradic

#3F74BE #BE3FB4 #BE893F #3FBE4A

square

#3F74BE #BE3FB4 #BE893F #3FBE4A

split-complementary

#3F74BE #BE4A3F #B4BE3F

monochromatic

#213C62 #305890 #3F74BE #6C95CE #9AB6DD

Accessibility & contrast

On white

4.72

#3F74BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3F74BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74BE

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74BE	#FFFFFF	#000000	##FFFFFF
##3F74BE	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#537AC1

Deuteranopia (green-blind)

#406EBC

Tritanopia (blue-blind)

#008590

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f74be;
/* rgb */ color: rgb(63, 116, 190);
/* oklch */ color: oklch(55.8% 0.129 257.1);

Tailwind

colors: {
  custom: {
    50: '#819bd2',
    500: '#3f74be',
    950: '#000000',
  },
}

SCSS

$custom: #3f74be;
$custom-light: #819bd2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74be",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 190
  },
  "hsl": {
    "h": 214.961,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55848,
    "c": 0.12866,
    "h": 257.1
  },
  "luminance": 0.17265
}

Semantic roles & 50–950 ramp

primary

#3F74BE

secondary

#C9B18F

accent

#9F4EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F74BE

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

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