#3978B7#3978B7

#3978B7 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.118 H 250.7°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3978B7
RGB	rgb(57, 120, 183)
HSL	hsl(210, 53%, 47%)
HSV	hsv(210, 69%, 72%)
CMYK	cmyk(68.9%, 34.4%, 0%, 28.2%)
CIE-LAB	lab(49.15, 0.59, -39.15)
CIE-LCH	lch(49.15, 39.16, 270.86°)
OKLab	oklab(56.1% -0.0389 -0.1111)
OKLCH	oklch(56.1% 0.118 250.7)
XYZ	xyz(16.9479, 17.7199, 47.3177)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978B7 #B77839

analogous

#39B7B7 #3978B7 #3939B7

triadic

#3978B7 #B73978 #78B739

tetradic

#3978B7 #B739B7 #B77839 #39B739

square

#3978B7 #B739B7 #B77839 #39B739

split-complementary

#3978B7 #B73939 #B7B739

monochromatic

#1C3B5A #2A5988 #3978B7 #6097CD #8EB5DC

Accessibility & contrast

On white

4.62

#3978B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3978B7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978B7

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978B7	#FFFFFF	#000000	##FFFFFF
##3978B7	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)

#5C7BBA

Deuteranopia (green-blind)

#4A6FB6

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3978b7;
/* rgb */ color: rgb(57, 120, 183);
/* oklch */ color: oklch(56.1% 0.118 250.7);

Tailwind

colors: {
  custom: {
    50: '#7e9ecd',
    500: '#3978b7',
    950: '#000000',
  },
}

SCSS

$custom: #3978b7;
$custom-light: #7e9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3978b7",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 183
  },
  "hsl": {
    "h": 210,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.56104,
    "c": 0.11767,
    "h": 250.7
  },
  "luminance": 0.17722
}

Semantic roles & 50–950 ramp

primary

#3978B7

secondary

#C7A685

accent

#944CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3978B7

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

Preview Lab → · Contrast checker → · Palette generator →