#377EC9#377EC9

#377EC9 is a mid, vivid cyan. Relative luminance 0.200; OKLCH L 58.4% C 0.136 H 252.3°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#377EC9
RGB	rgb(55, 126, 201)
HSL	hsl(211, 57%, 50%)
HSV	hsv(211, 73%, 79%)
CMYK	cmyk(72.6%, 37.3%, 0%, 21.2%)
CIE-LAB	lab(51.78, 3.12, -45.33)
CIE-LCH	lch(51.78, 45.43, 273.94°)
OKLab	oklab(58.45% -0.0412 -0.1291)
OKLCH	oklch(58.45% 0.136 252.3)
XYZ	xyz(19.5751, 19.9488, 58.0659)
Luminance	0.1995 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EC9 #C98237

analogous

#37C7C9 #377EC9 #3937C9

triadic

#377EC9 #C9377E #7EC937

tetradic

#377EC9 #C937C7 #C98237 #37C939

square

#377EC9 #C937C7 #C98237 #37C939

split-complementary

#377EC9 #C93937 #C7C937

monochromatic

#1C4269 #296099 #377EC9 #679DD6 #97BCE3

Accessibility & contrast

On white

4.21

#377EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#377EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EC9

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EC9	#FFFFFF	#000000	##000000
##377EC9	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B83CC

Deuteranopia (green-blind)

#4675C8

Tritanopia (blue-blind)

#00909A

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #377ec9;
/* rgb */ color: rgb(55, 126, 201);
/* oklch */ color: oklch(58.4% 0.136 252.3);

Tailwind

colors: {
  custom: {
    50: '#80a2da',
    500: '#377ec9',
    950: '#000000',
  },
}

SCSS

$custom: #377ec9;
$custom-light: #80a2da;
$custom-dark: #000000;

JSON

{
  "hex": "#377ec9",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 201
  },
  "hsl": {
    "h": 210.822,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.58447,
    "c": 0.1355,
    "h": 252.3
  },
  "luminance": 0.19951
}

Semantic roles & 50–950 ramp

primary

#377EC9

secondary

#CFAF8D

accent

#9647E1

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0F15

muted

#7D7E83

Preview Lab

Preview with #377EC9

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

Preview Lab → · Contrast checker → · Palette generator →