#377BB0#377BB0

#377BB0 is a mid, moderate cyan. Relative luminance 0.181; OKLCH L 56.3% C 0.107 H 245.0°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#377BB0
RGB	rgb(55, 123, 176)
HSL	hsl(206, 52%, 45%)
HSV	hsv(206, 69%, 69%)
CMYK	cmyk(68.8%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.63, -4.01, -34.36)
CIE-LCH	lch(49.63, 34.60, 263.34°)
OKLab	oklab(56.35% -0.0453 -0.0971)
OKLCH	oklch(56.35% 0.107 245)
XYZ	xyz(16.4920, 18.1110, 43.6925)
Luminance	0.1811 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BB0 #B06C37

analogous

#37B0A8 #377BB0 #373EB0

triadic

#377BB0 #B0377B #7BB037

tetradic

#377BB0 #A837B0 #B06C37 #3EB037

square

#377BB0 #A837B0 #B06C37 #3EB037

split-complementary

#377BB0 #B0373E #B0A837

monochromatic

#1A3A53 #285A81 #377BB0 #5999CB #88B6DA

Accessibility & contrast

On white

4.54

#377BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#377BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BB0

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BB0	#FFFFFF	#000000	##000000
##377BB0	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637CB2

Deuteranopia (green-blind)

#5371AF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #377bb0;
/* rgb */ color: rgb(55, 123, 176);
/* oklch */ color: oklch(56.3% 0.107 245.0);

Tailwind

colors: {
  custom: {
    50: '#7ca1c8',
    500: '#377bb0',
    950: '#000000',
  },
}

SCSS

$custom: #377bb0;
$custom-light: #7ca1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#377bb0",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 206.281,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.56345,
    "c": 0.10716,
    "h": 245
  },
  "luminance": 0.18113
}

Semantic roles & 50–950 ramp

primary

#377BB0

secondary

#C49D7F

accent

#8B4CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #377BB0

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

Preview Lab → · Contrast checker → · Palette generator →