#377DB3#377DB3

#377DB3 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 57.0% C 0.109 H 244.8°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#377DB3
RGB	rgb(55, 125, 179)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 69%, 70%)
CMYK	cmyk(69.3%, 30.2%, 0%, 29.8%)
CIE-LAB	lab(50.37, -4.14, -34.93)
CIE-LCH	lch(50.37, 35.18, 263.24°)
OKLab	oklab(56.98% -0.0464 -0.0987)
OKLCH	oklch(56.98% 0.109 244.8)
XYZ	xyz(17.0428, 18.7323, 45.3566)
Luminance	0.1873 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DB3 #B36D37

analogous

#37B3AB #377DB3 #373FB3

triadic

#377DB3 #B3377D #7DB337

tetradic

#377DB3 #AB37B3 #B36D37 #3FB337

square

#377DB3 #AB37B3 #B36D37 #3FB337

split-complementary

#377DB3 #B3373F #B3AB37

monochromatic

#1A3C55 #295C84 #377DB3 #5B9BCD #8AB7DB

Accessibility & contrast

On white

4.42

#377DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#377DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DB3

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DB3	#FFFFFF	#000000	##000000
##377DB3	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657EB5

Deuteranopia (green-blind)

#5473B2

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377db3;
/* rgb */ color: rgb(55, 125, 179);
/* oklch */ color: oklch(57.0% 0.109 244.8);

Tailwind

colors: {
  custom: {
    50: '#7ca2ca',
    500: '#377db3',
    950: '#000000',
  },
}

SCSS

$custom: #377db3;
$custom-light: #7ca2ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377db3",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 179
  },
  "hsl": {
    "h": 206.129,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.56978,
    "c": 0.10912,
    "h": 244.8
  },
  "luminance": 0.18734
}

Semantic roles & 50–950 ramp

primary

#377DB3

secondary

#C59E81

accent

#8B4BDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377DB3

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

Preview Lab → · Contrast checker → · Palette generator →