#377FB1#377FB1

#377FB1 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.3% C 0.105 H 242.2°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#377FB1
RGB	rgb(55, 127, 177)
HSL	hsl(205, 53%, 45%)
HSV	hsv(205, 69%, 69%)
CMYK	cmyk(68.9%, 28.2%, 0%, 30.6%)
CIE-LAB	lab(50.88, -6.02, -32.99)
CIE-LCH	lch(50.88, 33.53, 259.67°)
OKLab	oklab(57.35% -0.0491 -0.0931)
OKLCH	oklch(57.35% 0.105 242.2)
XYZ	xyz(17.0977, 19.1635, 44.3843)
Luminance	0.1916 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FB1 #B16937

analogous

#37B1A6 #377FB1 #3742B1

triadic

#377FB1 #B1377F #7FB137

tetradic

#377FB1 #A637B1 #B16937 #42B137

square

#377FB1 #A637B1 #B16937 #42B137

split-complementary

#377FB1 #B13742 #B1A637

monochromatic

#1A3C54 #285D82 #377FB1 #5A9DCC #88B9DA

Accessibility & contrast

On white

4.35

#377FB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#377FB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FB1

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FB1	#FFFFFF	#000000	##000000
##377FB1	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6880B3

Deuteranopia (green-blind)

#5874B0

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377fb1;
/* rgb */ color: rgb(55, 127, 177);
/* oklch */ color: oklch(57.3% 0.105 242.2);

Tailwind

colors: {
  custom: {
    50: '#7ca4c8',
    500: '#377fb1',
    950: '#000000',
  },
}

SCSS

$custom: #377fb1;
$custom-light: #7ca4c8;
$custom-dark: #000000;

JSON

{
  "hex": "#377fb1",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 177
  },
  "hsl": {
    "h": 204.59,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.57346,
    "c": 0.10523,
    "h": 242.2
  },
  "luminance": 0.19165
}

Semantic roles & 50–950 ramp

primary

#377FB1

secondary

#C49C80

accent

#874CDC

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377FB1

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

Preview Lab → · Contrast checker → · Palette generator →