#377ED3#377ED3

#377ED3 is a mid, vivid cyan. Relative luminance 0.204; OKLCH L 59.1% C 0.148 H 254.8°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#377ED3
RGB	rgb(55, 126, 211)
HSL	hsl(213, 64%, 52%)
HSV	hsv(213, 74%, 83%)
CMYK	cmyk(73.9%, 40.3%, 0%, 17.3%)
CIE-LAB	lab(52.33, 6.75, -50.14)
CIE-LCH	lch(52.33, 50.59, 277.67°)
OKLab	oklab(59.05% -0.0389 -0.1432)
OKLCH	oklch(59.05% 0.148 254.8)
XYZ	xyz(20.7899, 20.4347, 64.4640)
Luminance	0.2044 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377ED3 #D38C37

analogous

#37CCD3 #377ED3 #3E37D3

triadic

#377ED3 #D3377E #7ED337

tetradic

#377ED3 #D337CC #D38C37 #37D33E

square

#377ED3 #D337CC #D38C37 #37D33E

split-complementary

#377ED3 #D33E37 #CCD337

monochromatic

#1A4476 #2561A8 #377ED3 #699EDE #9BBFE9

Accessibility & contrast

On white

4.13

#377ED3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#377ED3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377ED3

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377ED3	#FFFFFF	#000000	##000000
##377ED3	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5685D6

Deuteranopia (green-blind)

#3C76D1

Tritanopia (blue-blind)

#00929E

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #377ed3;
/* rgb */ color: rgb(55, 126, 211);
/* oklch */ color: oklch(59.1% 0.148 254.8);

Tailwind

colors: {
  custom: {
    50: '#82a2e1',
    500: '#377ed3',
    950: '#000000',
  },
}

SCSS

$custom: #377ed3;
$custom-light: #82a2e1;
$custom-dark: #000000;

JSON

{
  "hex": "#377ed3",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 211
  },
  "hsl": {
    "h": 212.692,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.5905,
    "c": 0.14836,
    "h": 254.8
  },
  "luminance": 0.20437
}

Semantic roles & 50–950 ramp

primary

#377ED3

secondary

#D5B691

accent

#9B41E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0F15

muted

#7D7E83

Preview Lab

Preview with #377ED3

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

Preview Lab → · Contrast checker → · Palette generator →