#377EA5#377EA5

#377EA5 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.5% C 0.093 H 235.8°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#377EA5
RGB	rgb(55, 126, 165)
HSL	hsl(201, 50%, 43%)
HSV	hsv(201, 67%, 65%)
CMYK	cmyk(66.7%, 23.6%, 0%, 35.3%)
CIE-LAB	lab(50.04, -9.57, -27.35)
CIE-LCH	lch(50.04, 28.97, 250.71°)
OKLab	oklab(56.5% -0.0522 -0.0768)
OKLCH	oklch(56.5% 0.093 235.8)
XYZ	xyz(15.8253, 18.4489, 38.3170)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EA5 #A55E37

analogous

#37A595 #377EA5 #3747A5

triadic

#377EA5 #A5377E #7EA537

tetradic

#377EA5 #9537A5 #A55E37 #47A537

square

#377EA5 #9537A5 #A55E37 #47A537

split-complementary

#377EA5 #A53747 #A59537

monochromatic

#183849 #285B77 #377EA5 #539DC6 #81B7D5

Accessibility & contrast

On white

4.48

#377EA5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#377EA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EA5

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EA5	#FFFFFF	#000000	##000000
##377EA5	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7DA7

Deuteranopia (green-blind)

#5C72A4

Tritanopia (blue-blind)

#00888B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377ea5;
/* rgb */ color: rgb(55, 126, 165);
/* oklch */ color: oklch(56.5% 0.093 235.8);

Tailwind

colors: {
  custom: {
    50: '#7aa3c0',
    500: '#377ea5',
    950: '#000000',
  },
}

SCSS

$custom: #377ea5;
$custom-light: #7aa3c0;
$custom-dark: #000000;

JSON

{
  "hex": "#377ea5",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 165
  },
  "hsl": {
    "h": 201.273,
    "s": 50,
    "l": 43.137
  },
  "oklch": {
    "l": 0.56501,
    "c": 0.09281,
    "h": 235.8
  },
  "luminance": 0.18451
}

Semantic roles & 50–950 ramp

primary

#377EA5

secondary

#BF9279

accent

#804EDA

background

#F7FAFB

surface

#EEF3F7

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #377EA5

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

Preview Lab → · Contrast checker → · Palette generator →