#377ECC#377ECC

#377ECC is a mid, vivid cyan. Relative luminance 0.201; OKLCH L 58.6% C 0.139 H 253.1°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#377ECC
RGB	rgb(55, 126, 204)
HSL	hsl(211, 59%, 51%)
HSV	hsv(211, 73%, 80%)
CMYK	cmyk(73%, 38.2%, 0%, 20%)
CIE-LAB	lab(51.94, 4.21, -46.78)
CIE-LCH	lch(51.94, 46.97, 275.14°)
OKLab	oklab(58.63% -0.0405 -0.1333)
OKLCH	oklch(58.63% 0.139 253.1)
XYZ	xyz(19.9314, 20.0913, 59.9426)
Luminance	0.2009 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377ECC #CC8537

analogous

#37C9CC #377ECC #3A37CC

triadic

#377ECC #CC377E #7ECC37

tetradic

#377ECC #CC37C9 #CC8537 #37CC3A

square

#377ECC #CC37C9 #CC8537 #37CC3A

split-complementary

#377ECC #CC3A37 #C9CC37

monochromatic

#1C426D #28609E #377ECC #689DD8 #99BDE5

Accessibility & contrast

On white

4.18

#377ECC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.02

#377ECC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377ECC

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377ECC	#FFFFFF	#000000	##000000
##377ECC	1.00	4.18	5.02	5.02
#FFFFFF	4.18	1.00	21.00	21.00
#000000	5.02	21.00	1.00	1.00
##000000	5.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A83CF

Deuteranopia (green-blind)

#4376CA

Tritanopia (blue-blind)

#00909B

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377ecc;
/* rgb */ color: rgb(55, 126, 204);
/* oklch */ color: oklch(58.6% 0.139 253.1);

Tailwind

colors: {
  custom: {
    50: '#81a2dc',
    500: '#377ecc',
    950: '#000000',
  },
}

SCSS

$custom: #377ecc;
$custom-light: #81a2dc;
$custom-dark: #000000;

JSON

{
  "hex": "#377ecc",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 204
  },
  "hsl": {
    "h": 211.409,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.58625,
    "c": 0.13934,
    "h": 253.1
  },
  "luminance": 0.20094
}

Semantic roles & 50–950 ramp

primary

#377ECC

secondary

#D0B18E

accent

#9845E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0F15

muted

#7D7E83

Preview Lab

Preview with #377ECC

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

Preview Lab → · Contrast checker → · Palette generator →