#377CD9#377CD9

#377CD9 is a mid, vivid cyan. Relative luminance 0.202; OKLCH L 59.0% C 0.158 H 256.9°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#377CD9
RGB	rgb(55, 124, 217)
HSL	hsl(214, 68%, 53%)
HSV	hsv(214, 75%, 85%)
CMYK	cmyk(74.7%, 42.9%, 0%, 14.9%)
CIE-LAB	lab(52.10, 10.18, -53.88)
CIE-LCH	lch(52.10, 54.84, 280.69°)
OKLab	oklab(58.99% -0.0359 -0.1542)
OKLCH	oklch(58.99% 0.158 256.9)
XYZ	xyz(21.3030, 20.2349, 68.4152)
Luminance	0.2024 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CD9 #D99437

analogous

#37CDD9 #377CD9 #4337D9

triadic

#377CD9 #D9377C #7CD937

tetradic

#377CD9 #D937CD #D99437 #37D943

square

#377CD9 #D937CD #D99437 #37D943

split-complementary

#377CD9 #D94337 #CDD937

monochromatic

#18437E #225FB1 #377CD9 #6A9EE3 #9EBFED

Accessibility & contrast

On white

4.16

#377CD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#377CD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CD9

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CD9	#FFFFFF	#000000	##000000
##377CD9	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E84DD

Deuteranopia (green-blind)

#3075D7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377cd9;
/* rgb */ color: rgb(55, 124, 217);
/* oklch */ color: oklch(59.0% 0.158 256.9);

Tailwind

colors: {
  custom: {
    50: '#83a1e5',
    500: '#377cd9',
    950: '#000000',
  },
}

SCSS

$custom: #377cd9;
$custom-light: #83a1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#377cd9",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 217
  },
  "hsl": {
    "h": 214.444,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58988,
    "c": 0.15834,
    "h": 256.9
  },
  "luminance": 0.20237
}

Semantic roles & 50–950 ramp

primary

#377CD9

secondary

#D9BB93

accent

#A13DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #377CD9

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

Preview Lab → · Contrast checker → · Palette generator →