#3770C4#3770C4

#3770C4 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.0% C 0.144 H 258.2°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3770C4
RGB	rgb(55, 112, 196)
HSL	hsl(216, 56%, 49%)
HSV	hsv(216, 72%, 77%)
CMYK	cmyk(71.9%, 42.9%, 0%, 23.1%)
CIE-LAB	lab(47.47, 9.93, -49.32)
CIE-LCH	lch(47.47, 50.31, 281.38°)
OKLab	oklab(55.01% -0.0295 -0.141)
OKLCH	oklch(55.01% 0.144 258.2)
XYZ	xyz(17.3299, 16.3842, 54.4630)
Luminance	0.1639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770C4 #C48B37

analogous

#37B7C4 #3770C4 #4537C4

triadic

#3770C4 #C43770 #70C437

tetradic

#3770C4 #C437B7 #C48B37 #37C445

square

#3770C4 #C437B7 #C48B37 #37C445

split-complementary

#3770C4 #C44537 #B7C437

monochromatic

#1C3964 #2A5594 #3770C4 #6591D4 #94B3E1

Accessibility & contrast

On white

4.91

#3770C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#3770C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770C4

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770C4	#FFFFFF	#000000	##FFFFFF
##3770C4	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4778C7

Deuteranopia (green-blind)

#2E6BC2

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3770c4;
/* rgb */ color: rgb(55, 112, 196);
/* oklch */ color: oklch(55.0% 0.144 258.2);

Tailwind

colors: {
  custom: {
    50: '#7f98d6',
    500: '#3770c4',
    950: '#000000',
  },
}

SCSS

$custom: #3770c4;
$custom-light: #7f98d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3770c4",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 196
  },
  "hsl": {
    "h": 215.745,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55006,
    "c": 0.14407,
    "h": 258.2
  },
  "luminance": 0.16386
}

Semantic roles & 50–950 ramp

primary

#3770C4

secondary

#CCB28B

accent

#A248DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3770C4

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

Preview Lab → · Contrast checker → · Palette generator →