#3F78B2#3F78B2

#3F78B2 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.109 H 250.7°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F78B2
RGB	rgb(63, 120, 178)
HSL	hsl(210, 48%, 47%)
HSV	hsv(210, 65%, 70%)
CMYK	cmyk(64.6%, 32.6%, 0%, 30.2%)
CIE-LAB	lab(49.13, -0.15, -36.28)
CIE-LCH	lch(49.13, 36.28, 269.77°)
OKLab	oklab(56.07% -0.0359 -0.1026)
OKLCH	oklch(56.07% 0.109 250.7)
XYZ	xyz(16.7993, 17.7024, 44.6424)
Luminance	0.1770 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78B2 #B2793F

analogous

#3FB2B2 #3F78B2 #403FB2

triadic

#3F78B2 #B23F78 #78B23F

tetradic

#3F78B2 #B23FB2 #B2793F #3FB240

square

#3F78B2 #B23FB2 #B2793F #3FB240

split-complementary

#3F78B2 #B2403F #B2B23F

monochromatic

#1F3B58 #2F5A85 #3F78B2 #6697C9 #93B5D9

Accessibility & contrast

On white

4.62

#3F78B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3F78B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F78B2

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78B2	#FFFFFF	#000000	##FFFFFF
##3F78B2	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7BB4

Deuteranopia (green-blind)

#4F70B1

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f78b2;
/* rgb */ color: rgb(63, 120, 178);
/* oklch */ color: oklch(56.1% 0.109 250.7);

Tailwind

colors: {
  custom: {
    50: '#7f9ec9',
    500: '#3f78b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f78b2;
$custom-light: #7f9ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78b2",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 178
  },
  "hsl": {
    "h": 210.261,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.56068,
    "c": 0.10872,
    "h": 250.7
  },
  "luminance": 0.17704
}

Semantic roles & 50–950 ramp

primary

#3F78B2

secondary

#C4A789

accent

#9450D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F78B2

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

Preview Lab → · Contrast checker → · Palette generator →