#377FCB#377FCB

#377FCB is a mid, vivid cyan. Relative luminance 0.203; OKLCH L 58.8% C 0.137 H 252.3°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#377FCB
RGB	rgb(55, 127, 203)
HSL	hsl(211, 59%, 51%)
HSV	hsv(211, 73%, 80%)
CMYK	cmyk(72.9%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(52.18, 3.24, -45.84)
CIE-LCH	lch(52.18, 45.95, 274.04°)
OKLab	oklab(58.79% -0.0417 -0.1305)
OKLCH	oklch(58.79% 0.137 252.3)
XYZ	xyz(19.9404, 20.3005, 59.3558)
Luminance	0.2030 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FCB #CB8337

analogous

#37C9CB #377FCB #3937CB

triadic

#377FCB #CB377F #7FCB37

tetradic

#377FCB #CB37C9 #CB8337 #37CB39

square

#377FCB #CB37C9 #CB8337 #37CB39

split-complementary

#377FCB #CB3937 #C9CB37

monochromatic

#1C436C #29619C #377FCB #689ED8 #98BDE4

Accessibility & contrast

On white

4.15

#377FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#377FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FCB

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FCB	#FFFFFF	#000000	##000000
##377FCB	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C84CE

Deuteranopia (green-blind)

#4676C9

Tritanopia (blue-blind)

#00919B

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377fcb;
/* rgb */ color: rgb(55, 127, 203);
/* oklch */ color: oklch(58.8% 0.137 252.3);

Tailwind

colors: {
  custom: {
    50: '#80a3db',
    500: '#377fcb',
    950: '#000000',
  },
}

SCSS

$custom: #377fcb;
$custom-light: #80a3db;
$custom-dark: #000000;

JSON

{
  "hex": "#377fcb",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 210.811,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.58791,
    "c": 0.13703,
    "h": 252.3
  },
  "luminance": 0.20303
}

Semantic roles & 50–950 ramp

primary

#377FCB

secondary

#D0B08E

accent

#9646E2

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #377FCB

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

Preview Lab → · Contrast checker → · Palette generator →