#3978B8#3978B8

#3978B8 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 56.2% C 0.119 H 251.1°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3978B8
RGB	rgb(57, 120, 184)
HSL	hsl(210, 53%, 47%)
HSV	hsv(210, 69%, 72%)
CMYK	cmyk(69%, 34.8%, 0%, 27.8%)
CIE-LAB	lab(49.21, 0.94, -39.65)
CIE-LCH	lch(49.21, 39.66, 271.36°)
OKLab	oklab(56.16% -0.0386 -0.1125)
OKLCH	oklch(56.16% 0.119 251.1)
XYZ	xyz(17.0523, 17.7617, 47.8678)
Luminance	0.1776 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978B8 #B87939

analogous

#39B8B8 #3978B8 #3939B8

triadic

#3978B8 #B83978 #78B839

tetradic

#3978B8 #B839B8 #B87939 #39B839

square

#3978B8 #B839B8 #B87939 #39B839

split-complementary

#3978B8 #B83939 #B8B839

monochromatic

#1C3B5B #2B5A89 #3978B8 #6097CE #8FB5DC

Accessibility & contrast

On white

4.61

#3978B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3978B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978B8

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978B8	#FFFFFF	#000000	##FFFFFF
##3978B8	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7CBB

Deuteranopia (green-blind)

#4970B7

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3978b8;
/* rgb */ color: rgb(57, 120, 184);
/* oklch */ color: oklch(56.2% 0.119 251.1);

Tailwind

colors: {
  custom: {
    50: '#7e9ecd',
    500: '#3978b8',
    950: '#000000',
  },
}

SCSS

$custom: #3978b8;
$custom-light: #7e9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3978b8",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 184
  },
  "hsl": {
    "h": 210.236,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.5616,
    "c": 0.11895,
    "h": 251.1
  },
  "luminance": 0.17763
}

Semantic roles & 50–950 ramp

primary

#3978B8

secondary

#C7A786

accent

#944CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3978B8

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

Preview Lab → · Contrast checker → · Palette generator →