#377CB3#377CB3

#377CB3 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.7% C 0.110 H 245.6°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#377CB3
RGB	rgb(55, 124, 179)
HSL	hsl(207, 53%, 46%)
HSV	hsv(207, 69%, 70%)
CMYK	cmyk(69.3%, 30.7%, 0%, 29.8%)
CIE-LAB	lab(50.07, -3.55, -35.40)
CIE-LCH	lch(50.07, 35.58, 264.28°)
OKLab	oklab(56.74% -0.0454 -0.1001)
OKLCH	oklch(56.74% 0.11 245.6)
XYZ	xyz(16.9168, 18.4804, 45.3146)
Luminance	0.1848 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CB3 #B36E37

analogous

#37B3AC #377CB3 #373EB3

triadic

#377CB3 #B3377C #7CB337

tetradic

#377CB3 #AC37B3 #B36E37 #3EB337

square

#377CB3 #AC37B3 #B36E37 #3EB337

split-complementary

#377CB3 #B3373E #B3AC37

monochromatic

#1A3B55 #295C84 #377CB3 #5B9ACD #8AB7DB

Accessibility & contrast

On white

4.47

#377CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#377CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CB3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CB3	#FFFFFF	#000000	##000000
##377CB3	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637EB5

Deuteranopia (green-blind)

#5272B2

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377cb3;
/* rgb */ color: rgb(55, 124, 179);
/* oklch */ color: oklch(56.7% 0.110 245.6);

Tailwind

colors: {
  custom: {
    50: '#7ca1ca',
    500: '#377cb3',
    950: '#000000',
  },
}

SCSS

$custom: #377cb3;
$custom-light: #7ca1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377cb3",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 179
  },
  "hsl": {
    "h": 206.613,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.56742,
    "c": 0.10993,
    "h": 245.6
  },
  "luminance": 0.18482
}

Semantic roles & 50–950 ramp

primary

#377CB3

secondary

#C59F81

accent

#8C4BDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377CB3

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

Preview Lab → · Contrast checker → · Palette generator →