#3978B2#3978B2

#3978B2 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.8% C 0.111 H 248.8°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3978B2
RGB	rgb(57, 120, 178)
HSL	hsl(209, 51%, 46%)
HSV	hsv(209, 68%, 70%)
CMYK	cmyk(68%, 32.6%, 0%, 30.2%)
CIE-LAB	lab(48.90, -1.19, -36.66)
CIE-LCH	lch(48.90, 36.68, 268.14°)
OKLab	oklab(55.82% -0.0403 -0.1038)
OKLCH	oklch(55.82% 0.111 248.8)
XYZ	xyz(16.4367, 17.5154, 44.6254)
Luminance	0.1752 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978B2 #B27339

analogous

#39B2AF #3978B2 #393CB2

triadic

#3978B2 #B23978 #78B239

tetradic

#3978B2 #AF39B2 #B27339 #3CB239

square

#3978B2 #AF39B2 #B27339 #3CB239

split-complementary

#3978B2 #B2393C #B2AF39

monochromatic

#1B3955 #2A5984 #3978B2 #5D96CB #8BB4DA

Accessibility & contrast

On white

4.66

#3978B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3978B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978B2

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978B2	#FFFFFF	#000000	##FFFFFF
##3978B2	1.00	4.66	4.50	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7BB4

Deuteranopia (green-blind)

#4D6FB1

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3978b2;
/* rgb */ color: rgb(57, 120, 178);
/* oklch */ color: oklch(55.8% 0.111 248.8);

Tailwind

colors: {
  custom: {
    50: '#7d9ec9',
    500: '#3978b2',
    950: '#000000',
  },
}

SCSS

$custom: #3978b2;
$custom-light: #7d9ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#3978b2",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 178
  },
  "hsl": {
    "h": 208.76,
    "s": 51.489,
    "l": 46.078
  },
  "oklch": {
    "l": 0.55824,
    "c": 0.11133,
    "h": 248.8
  },
  "luminance": 0.17517
}

Semantic roles & 50–950 ramp

primary

#3978B2

secondary

#C4A282

accent

#914DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3978B2

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

Preview Lab → · Contrast checker → · Palette generator →