#3977D2#3977D2

#3977D2 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 57.5% C 0.154 H 258.2°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3977D2
RGB	rgb(57, 119, 210)
HSL	hsl(216, 63%, 52%)
HSV	hsv(216, 73%, 82%)
CMYK	cmyk(72.9%, 43.3%, 0%, 17.6%)
CIE-LAB	lab(50.35, 10.96, -52.72)
CIE-LCH	lch(50.35, 53.85, 281.75°)
OKLab	oklab(57.52% -0.0316 -0.1509)
OKLCH	oklch(57.52% 0.154 258.2)
XYZ	xyz(19.9128, 18.7145, 63.5231)
Luminance	0.1872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977D2 #D29439

analogous

#39C4D2 #3977D2 #4739D2

triadic

#3977D2 #D23977 #77D239

tetradic

#3977D2 #D239C4 #D29439 #39D247

square

#3977D2 #D239C4 #D29439 #39D247

split-complementary

#3977D2 #D24739 #C4D239

monochromatic

#1B4076 #265BA8 #3977D2 #6B99DD #9DBCE9

Accessibility & contrast

On white

4.43

#3977D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#3977D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3977D2

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977D2	#FFFFFF	#000000	##000000
##3977D2	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7FD6

Deuteranopia (green-blind)

#2E71D0

Tritanopia (blue-blind)

#008C9A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3977d2;
/* rgb */ color: rgb(57, 119, 210);
/* oklch */ color: oklch(57.5% 0.154 258.2);

Tailwind

colors: {
  custom: {
    50: '#829de0',
    500: '#3977d2',
    950: '#000000',
  },
}

SCSS

$custom: #3977d2;
$custom-light: #829de0;
$custom-dark: #000000;

JSON

{
  "hex": "#3977d2",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 210
  },
  "hsl": {
    "h": 215.686,
    "s": 62.963,
    "l": 52.353
  },
  "oklch": {
    "l": 0.57518,
    "c": 0.15413,
    "h": 258.2
  },
  "luminance": 0.18717
}

Semantic roles & 50–950 ramp

primary

#3977D2

secondary

#D5BA92

accent

#A342E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3977D2

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

Preview Lab → · Contrast checker → · Palette generator →