#377FB4#377FB4

#377FB4 is a mid, moderate cyan. Relative luminance 0.193; OKLCH L 57.5% C 0.109 H 243.7°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#377FB4
RGB	rgb(55, 127, 180)
HSL	hsl(205, 53%, 46%)
HSV	hsv(205, 69%, 71%)
CMYK	cmyk(69.4%, 29.4%, 0%, 29.4%)
CIE-LAB	lab(51.02, -4.97, -34.50)
CIE-LCH	lch(51.02, 34.85, 261.81°)
OKLab	oklab(57.5% -0.0482 -0.0974)
OKLCH	oklch(57.5% 0.109 243.7)
XYZ	xyz(17.4000, 19.2844, 45.9764)
Luminance	0.1929 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FB4 #B46C37

analogous

#37B4AA #377FB4 #3740B4

triadic

#377FB4 #B4377F #7FB437

tetradic

#377FB4 #AA37B4 #B46C37 #40B437

square

#377FB4 #AA37B4 #B46C37 #40B437

split-complementary

#377FB4 #B43740 #B4AA37

monochromatic

#1A3D56 #295E85 #377FB4 #5B9DCD #8AB9DB

Accessibility & contrast

On white

4.32

#377FB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#377FB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FB4

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FB4	#FFFFFF	#000000	##000000
##377FB4	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B6

Deuteranopia (green-blind)

#5674B3

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377fb4;
/* rgb */ color: rgb(55, 127, 180);
/* oklch */ color: oklch(57.5% 0.109 243.7);

Tailwind

colors: {
  custom: {
    50: '#7ca3ca',
    500: '#377fb4',
    950: '#000000',
  },
}

SCSS

$custom: #377fb4;
$custom-light: #7ca3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377fb4",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 180
  },
  "hsl": {
    "h": 205.44,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.57503,
    "c": 0.1087,
    "h": 243.7
  },
  "luminance": 0.19286
}

Semantic roles & 50–950 ramp

primary

#377FB4

secondary

#C69E81

accent

#894BDD

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377FB4

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

Preview Lab → · Contrast checker → · Palette generator →