#3F74B2#3F74B2

#3F74B2 is a mid, moderate cyan. Relative luminance 0.168; OKLCH L 55.1% C 0.113 H 253.7°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F74B2
RGB	rgb(63, 116, 178)
HSL	hsl(212, 48%, 47%)
HSV	hsv(212, 65%, 70%)
CMYK	cmyk(64.6%, 34.8%, 0%, 30.2%)
CIE-LAB	lab(47.96, 2.28, -38.14)
CIE-LCH	lch(47.96, 38.20, 273.42°)
OKLab	oklab(55.15% -0.0317 -0.1081)
OKLCH	oklch(55.15% 0.113 253.7)
XYZ	xyz(16.3283, 16.7603, 44.4854)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74B2 #B27D3F

analogous

#3FAEB2 #3F74B2 #443FB2

triadic

#3F74B2 #B23F74 #74B23F

tetradic

#3F74B2 #B23FAE #B27D3F #3FB244

square

#3F74B2 #B23FAE #B27D3F #3FB244

split-complementary

#3F74B2 #B2443F #AEB23F

monochromatic

#1F3958 #2F5785 #3F74B2 #6693C9 #93B3D9

Accessibility & contrast

On white

4.82

#3F74B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#3F74B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74B2

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74B2	#FFFFFF	#000000	##FFFFFF
##3F74B2	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5978B5

Deuteranopia (green-blind)

#496DB1

Tritanopia (blue-blind)

#00828B

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f74b2;
/* rgb */ color: rgb(63, 116, 178);
/* oklch */ color: oklch(55.1% 0.113 253.7);

Tailwind

colors: {
  custom: {
    50: '#7f9bc9',
    500: '#3f74b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f74b2;
$custom-light: #7f9bc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74b2",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 178
  },
  "hsl": {
    "h": 212.348,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.55147,
    "c": 0.11261,
    "h": 253.7
  },
  "luminance": 0.16762
}

Semantic roles & 50–950 ramp

primary

#3F74B2

secondary

#C4A989

accent

#9950D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F74B2

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

Preview Lab → · Contrast checker → · Palette generator →