#3775CC#3775CC

#3775CC is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.6% C 0.149 H 257.5°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3775CC
RGB	rgb(55, 117, 204)
HSL	hsl(215, 59%, 51%)
HSV	hsv(215, 73%, 80%)
CMYK	cmyk(73%, 42.6%, 0%, 20%)
CIE-LAB	lab(49.37, 9.74, -50.88)
CIE-LCH	lch(49.37, 51.81, 280.84°)
OKLab	oklab(56.62% -0.0324 -0.1455)
OKLCH	oklch(56.62% 0.149 257.5)
XYZ	xyz(18.8319, 17.8924, 59.5761)
Luminance	0.1789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3775CC #CC8E37

analogous

#37BFCC #3775CC #4337CC

triadic

#3775CC #CC3775 #75CC37

tetradic

#3775CC #CC37BF #CC8E37 #37CC43

square

#3775CC #CC37BF #CC8E37 #37CC43

split-complementary

#3775CC #CC4337 #BFCC37

monochromatic

#1C3D6D #28599E #3775CC #6897D8 #99B8E5

Accessibility & contrast

On white

4.59

#3775CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#3775CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3775CC

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3775CC	#FFFFFF	#000000	##FFFFFF
##3775CC	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7DCF

Deuteranopia (green-blind)

#306FCA

Tritanopia (blue-blind)

#008996

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3775cc;
/* rgb */ color: rgb(55, 117, 204);
/* oklch */ color: oklch(56.6% 0.149 257.5);

Tailwind

colors: {
  custom: {
    50: '#819cdc',
    500: '#3775cc',
    950: '#000000',
  },
}

SCSS

$custom: #3775cc;
$custom-light: #819cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3775cc",
  "rgb": {
    "r": 55,
    "g": 117,
    "b": 204
  },
  "hsl": {
    "h": 215.034,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56622,
    "c": 0.14908,
    "h": 257.5
  },
  "luminance": 0.17894
}

Semantic roles & 50–950 ramp

primary

#3775CC

secondary

#D0B58E

accent

#A145E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3775CC

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

Preview Lab → · Contrast checker → · Palette generator →