#377EC4#377EC4

#377EC4 is a mid, vivid cyan. Relative luminance 0.197; OKLCH L 58.2% C 0.129 H 250.8°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#377EC4
RGB	rgb(55, 126, 196)
HSL	hsl(210, 56%, 49%)
HSV	hsv(210, 72%, 77%)
CMYK	cmyk(71.9%, 35.7%, 0%, 23.1%)
CIE-LAB	lab(51.52, 1.32, -42.89)
CIE-LCH	lch(51.52, 42.91, 271.76°)
OKLab	oklab(58.16% -0.0425 -0.1219)
OKLCH	oklch(58.16% 0.129 250.8)
XYZ	xyz(18.9965, 19.7174, 55.0185)
Luminance	0.1972 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EC4 #C47D37

analogous

#37C4C4 #377EC4 #3738C4

triadic

#377EC4 #C4377E #7EC437

tetradic

#377EC4 #C437C4 #C47D37 #38C437

square

#377EC4 #C437C4 #C47D37 #38C437

split-complementary

#377EC4 #C43738 #C4C437

monochromatic

#1C4164 #2A5F94 #377EC4 #659CD4 #94BBE1

Accessibility & contrast

On white

4.25

#377EC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#377EC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EC4

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EC4	#FFFFFF	#000000	##000000
##377EC4	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E82C7

Deuteranopia (green-blind)

#4A75C3

Tritanopia (blue-blind)

#008F98

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #377ec4;
/* rgb */ color: rgb(55, 126, 196);
/* oklch */ color: oklch(58.2% 0.129 250.8);

Tailwind

colors: {
  custom: {
    50: '#7fa3d6',
    500: '#377ec4',
    950: '#000000',
  },
}

SCSS

$custom: #377ec4;
$custom-light: #7fa3d6;
$custom-dark: #000000;

JSON

{
  "hex": "#377ec4",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 196
  },
  "hsl": {
    "h": 209.787,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.58155,
    "c": 0.12915,
    "h": 250.8
  },
  "luminance": 0.19719
}

Semantic roles & 50–950 ramp

primary

#377EC4

secondary

#CCAB8B

accent

#9348DF

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0F14

muted

#7C7E83

Preview Lab

Preview with #377EC4

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

Preview Lab → · Contrast checker → · Palette generator →