#377FB3#377FB3

#377FB3 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.5% C 0.108 H 243.2°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#377FB3
RGB	rgb(55, 127, 179)
HSL	hsl(205, 53%, 46%)
HSV	hsv(205, 69%, 70%)
CMYK	cmyk(69.3%, 29.1%, 0%, 29.8%)
CIE-LAB	lab(50.97, -5.32, -33.99)
CIE-LCH	lch(50.97, 34.41, 261.11°)
OKLab	oklab(57.45% -0.0485 -0.096)
OKLCH	oklch(57.45% 0.108 243.2)
XYZ	xyz(17.2985, 19.2438, 45.4418)
Luminance	0.1925 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FB3 #B36B37

analogous

#37B3A9 #377FB3 #3741B3

triadic

#377FB3 #B3377F #7FB337

tetradic

#377FB3 #A937B3 #B36B37 #41B337

square

#377FB3 #A937B3 #B36B37 #41B337

split-complementary

#377FB3 #B33741 #B3A937

monochromatic

#1A3D55 #295E84 #377FB3 #5B9DCD #8AB9DB

Accessibility & contrast

On white

4.33

#377FB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#377FB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FB3

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FB3	#FFFFFF	#000000	##000000
##377FB3	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B5

Deuteranopia (green-blind)

#5674B2

Tritanopia (blue-blind)

#008C91

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377fb3;
/* rgb */ color: rgb(55, 127, 179);
/* oklch */ color: oklch(57.5% 0.108 243.2);

Tailwind

colors: {
  custom: {
    50: '#7ca3ca',
    500: '#377fb3',
    950: '#000000',
  },
}

SCSS

$custom: #377fb3;
$custom-light: #7ca3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377fb3",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 179
  },
  "hsl": {
    "h": 205.161,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.5745,
    "c": 0.10754,
    "h": 243.2
  },
  "luminance": 0.19246
}

Semantic roles & 50–950 ramp

primary

#377FB3

secondary

#C59D81

accent

#884BDC

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377FB3

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

Preview Lab → · Contrast checker → · Palette generator →