#3977CE#3977CE

#3977CE is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.3% C 0.149 H 257.4°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3977CE
RGB	rgb(57, 119, 206)
HSL	hsl(215, 60%, 52%)
HSV	hsv(215, 72%, 81%)
CMYK	cmyk(72.3%, 42.2%, 0%, 19.2%)
CIE-LAB	lab(50.12, 9.50, -50.82)
CIE-LCH	lch(50.12, 51.70, 280.59°)
OKLab	oklab(57.26% -0.0324 -0.1453)
OKLCH	oklch(57.26% 0.149 257.4)
XYZ	xyz(19.4207, 18.5176, 60.9313)
Luminance	0.1852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977CE #CE9039

analogous

#39C1CE #3977CE #4639CE

triadic

#3977CE #CE3977 #77CE39

tetradic

#3977CE #CE39C1 #CE9039 #39CE46

square

#3977CE #CE39C1 #CE9039 #39CE46

split-complementary

#3977CE #CE4639 #C1CE39

monochromatic

#1C3F71 #285BA2 #3977CE #6A99DA #9BBAE6

Accessibility & contrast

On white

4.46

#3977CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3977CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3977CE

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977CE	#FFFFFF	#000000	##000000
##3977CE	1.00	4.46	4.70	4.70
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D7FD1

Deuteranopia (green-blind)

#3371CC

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3977ce;
/* rgb */ color: rgb(57, 119, 206);
/* oklch */ color: oklch(57.3% 0.149 257.4);

Tailwind

colors: {
  custom: {
    50: '#829ddd',
    500: '#3977ce',
    950: '#000000',
  },
}

SCSS

$custom: #3977ce;
$custom-light: #829ddd;
$custom-dark: #000000;

JSON

{
  "hex": "#3977ce",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 206
  },
  "hsl": {
    "h": 215.034,
    "s": 60.324,
    "l": 51.569
  },
  "oklch": {
    "l": 0.57262,
    "c": 0.14883,
    "h": 257.4
  },
  "luminance": 0.1852
}

Semantic roles & 50–950 ramp

primary

#3977CE

secondary

#D2B791

accent

#A144E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3977CE

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

Preview Lab → · Contrast checker → · Palette generator →