#377DB1#377DB1

#377DB1 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 56.9% C 0.107 H 243.8°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#377DB1
RGB	rgb(55, 125, 177)
HSL	hsl(206, 53%, 45%)
HSV	hsv(206, 69%, 69%)
CMYK	cmyk(68.9%, 29.4%, 0%, 30.6%)
CIE-LAB	lab(50.28, -4.84, -33.93)
CIE-LCH	lch(50.28, 34.27, 261.88°)
OKLab	oklab(56.87% -0.0471 -0.0958)
OKLCH	oklch(56.87% 0.107 243.8)
XYZ	xyz(16.8420, 18.6520, 44.2990)
Luminance	0.1865 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DB1 #B16B37

analogous

#37B1A8 #377DB1 #3740B1

triadic

#377DB1 #B1377D #7DB137

tetradic

#377DB1 #A837B1 #B16B37 #40B137

square

#377DB1 #A837B1 #B16B37 #40B137

split-complementary

#377DB1 #B13740 #B1A837

monochromatic

#1A3B54 #285C82 #377DB1 #5A9BCC #88B7DA

Accessibility & contrast

On white

4.44

#377DB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#377DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DB1

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DB1	#FFFFFF	#000000	##000000
##377DB1	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667EB3

Deuteranopia (green-blind)

#5572B0

Tritanopia (blue-blind)

#008A8F

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377db1;
/* rgb */ color: rgb(55, 125, 177);
/* oklch */ color: oklch(56.9% 0.107 243.8);

Tailwind

colors: {
  custom: {
    50: '#7ca2c8',
    500: '#377db1',
    950: '#000000',
  },
}

SCSS

$custom: #377db1;
$custom-light: #7ca2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#377db1",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 177
  },
  "hsl": {
    "h": 205.574,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56871,
    "c": 0.10675,
    "h": 243.8
  },
  "luminance": 0.18654
}

Semantic roles & 50–950 ramp

primary

#377DB1

secondary

#C49D80

accent

#894CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377DB1

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

Preview Lab → · Contrast checker → · Palette generator →