#377CB1#377CB1

#377CB1 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.6% C 0.108 H 244.7°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#377CB1
RGB	rgb(55, 124, 177)
HSL	hsl(206, 53%, 45%)
HSV	hsv(206, 69%, 69%)
CMYK	cmyk(68.9%, 29.9%, 0%, 30.6%)
CIE-LAB	lab(49.98, -4.25, -34.40)
CIE-LCH	lch(49.98, 34.66, 262.95°)
OKLab	oklab(56.64% -0.046 -0.0972)
OKLCH	oklch(56.64% 0.108 244.7)
XYZ	xyz(16.7160, 18.4001, 44.2571)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CB1 #B16C37

analogous

#37B1A9 #377CB1 #373FB1

triadic

#377CB1 #B1377C #7CB137

tetradic

#377CB1 #A937B1 #B16C37 #3FB137

square

#377CB1 #A937B1 #B16C37 #3FB137

split-complementary

#377CB1 #B1373F #B1A937

monochromatic

#1A3B54 #285B82 #377CB1 #5A9ACC #88B7DA

Accessibility & contrast

On white

4.49

#377CB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#377CB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CB1

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CB1	#FFFFFF	#000000	##000000
##377CB1	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647DB3

Deuteranopia (green-blind)

#5372B0

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377cb1;
/* rgb */ color: rgb(55, 124, 177);
/* oklch */ color: oklch(56.6% 0.108 244.7);

Tailwind

colors: {
  custom: {
    50: '#7ca1c8',
    500: '#377cb1',
    950: '#000000',
  },
}

SCSS

$custom: #377cb1;
$custom-light: #7ca1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#377cb1",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 177
  },
  "hsl": {
    "h": 206.066,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56635,
    "c": 0.10754,
    "h": 244.7
  },
  "luminance": 0.18402
}

Semantic roles & 50–950 ramp

primary

#377CB1

secondary

#C49D80

accent

#8A4CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377CB1

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

Preview Lab → · Contrast checker → · Palette generator →