#377FB5#377FB5

#377FB5 is a mid, moderate cyan. Relative luminance 0.193; OKLCH L 57.6% C 0.110 H 244.2°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#377FB5
RGB	rgb(55, 127, 181)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 70%, 71%)
CMYK	cmyk(69.6%, 29.8%, 0%, 29%)
CIE-LAB	lab(51.07, -4.62, -35.00)
CIE-LCH	lch(51.07, 35.30, 262.49°)
OKLab	oklab(57.56% -0.0478 -0.0989)
OKLCH	oklch(57.56% 0.11 244.2)
XYZ	xyz(17.5022, 19.3253, 46.5149)
Luminance	0.1933 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FB5 #B56D37

analogous

#37B5AC #377FB5 #3740B5

triadic

#377FB5 #B5377F #7FB537

tetradic

#377FB5 #AC37B5 #B56D37 #40B537

square

#377FB5 #AC37B5 #B56D37 #40B537

split-complementary

#377FB5 #B53740 #B5AC37

monochromatic

#1A3D57 #295E86 #377FB5 #5C9DCD #8BB9DC

Accessibility & contrast

On white

4.32

#377FB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#377FB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FB5

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FB5	#FFFFFF	#000000	##000000
##377FB5	1.00	4.32	4.87	4.87
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B7

Deuteranopia (green-blind)

#5574B4

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #377fb5;
/* rgb */ color: rgb(55, 127, 181);
/* oklch */ color: oklch(57.6% 0.110 244.2);

Tailwind

colors: {
  custom: {
    50: '#7ca3cb',
    500: '#377fb5',
    950: '#000000',
  },
}

SCSS

$custom: #377fb5;
$custom-light: #7ca3cb;
$custom-dark: #000000;

JSON

{
  "hex": "#377fb5",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 181
  },
  "hsl": {
    "h": 205.714,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.57556,
    "c": 0.10988,
    "h": 244.2
  },
  "luminance": 0.19327
}

Semantic roles & 50–950 ramp

primary

#377FB5

secondary

#C69F82

accent

#894BDD

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377FB5

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

Preview Lab → · Contrast checker → · Palette generator →