#3770C0#3770C0

#3770C0 is a mid, vivid blue. Relative luminance 0.162; OKLCH L 54.8% C 0.139 H 257.4°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3770C0
RGB	rgb(55, 112, 192)
HSL	hsl(215, 55%, 48%)
HSV	hsv(215, 71%, 75%)
CMYK	cmyk(71.4%, 41.7%, 0%, 24.7%)
CIE-LAB	lab(47.24, 8.46, -47.39)
CIE-LCH	lch(47.24, 48.14, 280.12°)
OKLab	oklab(54.75% -0.0303 -0.1353)
OKLCH	oklch(54.75% 0.139 257.4)
XYZ	xyz(16.8807, 16.2045, 52.0971)
Luminance	0.1621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770C0 #C08737

analogous

#37B5C0 #3770C0 #4237C0

triadic

#3770C0 #C03770 #70C037

tetradic

#3770C0 #C037B5 #C08737 #37C042

square

#3770C0 #C037B5 #C08737 #37C042

split-complementary

#3770C0 #C04237 #B5C037

monochromatic

#1C3861 #295490 #3770C0 #6291D2 #92B2E0

Accessibility & contrast

On white

4.95

#3770C0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3770C0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770C0

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770C0	#FFFFFF	#000000	##FFFFFF
##3770C0	1.00	4.95	4.24	4.95
#FFFFFF	4.95	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A77C3

Deuteranopia (green-blind)

#336ABE

Tritanopia (blue-blind)

#00838E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3770c0;
/* rgb */ color: rgb(55, 112, 192);
/* oklch */ color: oklch(54.8% 0.139 257.4);

Tailwind

colors: {
  custom: {
    50: '#7e98d3',
    500: '#3770c0',
    950: '#000000',
  },
}

SCSS

$custom: #3770c0;
$custom-light: #7e98d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3770c0",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 192
  },
  "hsl": {
    "h": 215.036,
    "s": 55.466,
    "l": 48.431
  },
  "oklch": {
    "l": 0.5475,
    "c": 0.13869,
    "h": 257.4
  },
  "luminance": 0.16206
}

Semantic roles & 50–950 ramp

primary

#3770C0

secondary

#CBAF88

accent

#A049DF

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3770C0

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

Preview Lab → · Contrast checker → · Palette generator →