#377FD1#377FD1

#377FD1 is a mid, vivid cyan. Relative luminance 0.206; OKLCH L 59.2% C 0.145 H 253.9°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#377FD1
RGB	rgb(55, 127, 209)
HSL	hsl(212, 63%, 52%)
HSV	hsv(212, 74%, 82%)
CMYK	cmyk(73.7%, 39.2%, 0%, 18%)
CIE-LAB	lab(52.50, 5.42, -48.72)
CIE-LCH	lch(52.50, 49.02, 276.34°)
OKLab	oklab(59.15% -0.0402 -0.139)
OKLCH	oklch(59.15% 0.145 253.9)
XYZ	xyz(20.6693, 20.5921, 63.1946)
Luminance	0.2059 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FD1 #D18937

analogous

#37CCD1 #377FD1 #3C37D1

triadic

#377FD1 #D1377F #7FD137

tetradic

#377FD1 #D137CC #D18937 #37D13C

square

#377FD1 #D137CC #D18937 #37D13C

split-complementary

#377FD1 #D13C37 #CCD137

monochromatic

#1A4473 #2661A5 #377FD1 #699FDC #9BBFE8

Accessibility & contrast

On white

4.10

#377FD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#377FD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FD1

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FD1	#FFFFFF	#000000	##000000
##377FD1	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5885D4

Deuteranopia (green-blind)

#4077CF

Tritanopia (blue-blind)

#00929E

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #377fd1;
/* rgb */ color: rgb(55, 127, 209);
/* oklch */ color: oklch(59.2% 0.145 253.9);

Tailwind

colors: {
  custom: {
    50: '#81a3df',
    500: '#377fd1',
    950: '#000000',
  },
}

SCSS

$custom: #377fd1;
$custom-light: #81a3df;
$custom-dark: #000000;

JSON

{
  "hex": "#377fd1",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 209
  },
  "hsl": {
    "h": 211.948,
    "s": 62.602,
    "l": 51.765
  },
  "oklch": {
    "l": 0.5915,
    "c": 0.14471,
    "h": 253.9
  },
  "luminance": 0.20594
}

Semantic roles & 50–950 ramp

primary

#377FD1

secondary

#D4B490

accent

#9942E6

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #377FD1

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

Preview Lab → · Contrast checker → · Palette generator →