#377DD3#377DD3

#377DD3 is a mid, vivid cyan. Relative luminance 0.202; OKLCH L 58.8% C 0.149 H 255.3°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#377DD3
RGB	rgb(55, 125, 211)
HSL	hsl(213, 64%, 52%)
HSV	hsv(213, 74%, 83%)
CMYK	cmyk(73.9%, 40.8%, 0%, 17.3%)
CIE-LAB	lab(52.04, 7.37, -50.59)
CIE-LCH	lch(52.04, 51.12, 278.28°)
OKLab	oklab(58.83% -0.038 -0.1445)
OKLCH	oklch(58.83% 0.149 255.3)
XYZ	xyz(20.6627, 20.1803, 64.4216)
Luminance	0.2018 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DD3 #D38D37

analogous

#37CBD3 #377DD3 #3F37D3

triadic

#377DD3 #D3377D #7DD337

tetradic

#377DD3 #D337CB #D38D37 #37D33F

square

#377DD3 #D337CB #D38D37 #37D33F

split-complementary

#377DD3 #D33F37 #CBD337

monochromatic

#1A4376 #2560A8 #377DD3 #699EDE #9BBEE9

Accessibility & contrast

On white

4.17

#377DD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#377DD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DD3

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DD3	#FFFFFF	#000000	##000000
##377DD3	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5484D6

Deuteranopia (green-blind)

#3A75D1

Tritanopia (blue-blind)

#00919E

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377dd3;
/* rgb */ color: rgb(55, 125, 211);
/* oklch */ color: oklch(58.8% 0.149 255.3);

Tailwind

colors: {
  custom: {
    50: '#82a2e1',
    500: '#377dd3',
    950: '#000000',
  },
}

SCSS

$custom: #377dd3;
$custom-light: #82a2e1;
$custom-dark: #000000;

JSON

{
  "hex": "#377dd3",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 211
  },
  "hsl": {
    "h": 213.077,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58829,
    "c": 0.14943,
    "h": 255.3
  },
  "luminance": 0.20183
}

Semantic roles & 50–950 ramp

primary

#377DD3

secondary

#D5B691

accent

#9C41E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0F15

muted

#7D7E83

Preview Lab

Preview with #377DD3

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

Preview Lab → · Contrast checker → · Palette generator →