#3971BB#3971BB

#3971BB is a mid, vivid cyan. Relative luminance 0.163; OKLCH L 54.7% C 0.130 H 256.3°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3971BB
RGB	rgb(57, 113, 187)
HSL	hsl(214, 53%, 48%)
HSV	hsv(214, 70%, 73%)
CMYK	cmyk(69.5%, 39.6%, 0%, 26.7%)
CIE-LAB	lab(47.32, 6.32, -44.37)
CIE-LCH	lch(47.32, 44.82, 278.10°)
OKLab	oklab(54.74% -0.0309 -0.1264)
OKLCH	oklch(54.74% 0.13 256.3)
XYZ	xyz(16.5588, 16.2662, 49.2711)
Luminance	0.1627 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971BB #BB8339

analogous

#39B2BB #3971BB #4239BB

triadic

#3971BB #BB3971 #71BB39

tetradic

#3971BB #BB39B2 #BB8339 #39BB42

square

#3971BB #BB39B2 #BB8339 #39BB42

split-complementary

#3971BB #BB4239 #B2BB39

monochromatic

#1C385D #2B558C #3971BB #6291CF #91B2DD

Accessibility & contrast

On white

4.94

#3971BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#3971BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971BB

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971BB	#FFFFFF	#000000	##FFFFFF
##3971BB	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F77BE

Deuteranopia (green-blind)

#3B6BB9

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3971bb;
/* rgb */ color: rgb(57, 113, 187);
/* oklch */ color: oklch(54.7% 0.130 256.3);

Tailwind

colors: {
  custom: {
    50: '#7e99d0',
    500: '#3971bb',
    950: '#000000',
  },
}

SCSS

$custom: #3971bb;
$custom-light: #7e99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3971bb",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 187
  },
  "hsl": {
    "h": 214.154,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.54741,
    "c": 0.13017,
    "h": 256.3
  },
  "luminance": 0.16268
}

Semantic roles & 50–950 ramp

primary

#3971BB

secondary

#C8AC87

accent

#9E4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3971BB

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

Preview Lab → · Contrast checker → · Palette generator →