#377FCF#377FCF

#377FCF is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 59.0% C 0.142 H 253.4°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#377FCF
RGB	rgb(55, 127, 207)
HSL	hsl(212, 61%, 51%)
HSV	hsv(212, 73%, 81%)
CMYK	cmyk(73.4%, 38.6%, 0%, 18.8%)
CIE-LAB	lab(52.39, 4.69, -47.76)
CIE-LCH	lch(52.39, 47.99, 275.61°)
OKLab	oklab(59.03% -0.0407 -0.1362)
OKLCH	oklch(59.03% 0.142 253.4)
XYZ	xyz(20.4232, 20.4937, 61.8987)
Luminance	0.2050 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FCF #CF8737

analogous

#37CBCF #377FCF #3B37CF

triadic

#377FCF #CF377F #7FCF37

tetradic

#377FCF #CF37CB #CF8737 #37CF3B

square

#377FCF #CF37CB #CF8737 #37CF3B

split-complementary

#377FCF #CF3B37 #CBCF37

monochromatic

#1B4471 #2761A2 #377FCF #689FDB #9ABEE7

Accessibility & contrast

On white

4.12

#377FCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#377FCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FCF

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FCF	#FFFFFF	#000000	##000000
##377FCF	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A85D2

Deuteranopia (green-blind)

#4277CD

Tritanopia (blue-blind)

#00929D

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #377fcf;
/* rgb */ color: rgb(55, 127, 207);
/* oklch */ color: oklch(59.0% 0.142 253.4);

Tailwind

colors: {
  custom: {
    50: '#81a3de',
    500: '#377fcf',
    950: '#000000',
  },
}

SCSS

$custom: #377fcf;
$custom-light: #81a3de;
$custom-dark: #000000;

JSON

{
  "hex": "#377fcf",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 207
  },
  "hsl": {
    "h": 211.579,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.5903,
    "c": 0.14215,
    "h": 253.4
  },
  "luminance": 0.20496
}

Semantic roles & 50–950 ramp

primary

#377FCF

secondary

#D2B38F

accent

#9843E4

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #377FCF

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

Preview Lab → · Contrast checker → · Palette generator →