#377EA4#377EA4

#377EA4 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.5% C 0.092 H 235.1°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#377EA4
RGB	rgb(55, 126, 164)
HSL	hsl(201, 50%, 43%)
HSV	hsv(201, 66%, 64%)
CMYK	cmyk(66.5%, 23.2%, 0%, 35.7%)
CIE-LAB	lab(49.99, -9.91, -26.83)
CIE-LCH	lch(49.99, 28.60, 249.73°)
OKLab	oklab(56.45% -0.0525 -0.0753)
OKLCH	oklch(56.45% 0.092 235.1)
XYZ	xyz(15.7346, 18.4126, 37.8395)
Luminance	0.1841 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EA4 #A45D37

analogous

#37A493 #377EA4 #3748A4

triadic

#377EA4 #A4377E #7EA437

tetradic

#377EA4 #9337A4 #A45D37 #48A437

square

#377EA4 #9337A4 #A45D37 #48A437

split-complementary

#377EA4 #A43748 #A49337

monochromatic

#183848 #285B76 #377EA4 #539DC5 #81B7D5

Accessibility & contrast

On white

4.48

#377EA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#377EA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EA4

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EA4	#FFFFFF	#000000	##000000
##377EA4	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7DA6

Deuteranopia (green-blind)

#5D72A3

Tritanopia (blue-blind)

#00888B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377ea4;
/* rgb */ color: rgb(55, 126, 164);
/* oklch */ color: oklch(56.5% 0.092 235.1);

Tailwind

colors: {
  custom: {
    50: '#7aa3bf',
    500: '#377ea4',
    950: '#000000',
  },
}

SCSS

$custom: #377ea4;
$custom-light: #7aa3bf;
$custom-dark: #000000;

JSON

{
  "hex": "#377ea4",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 164
  },
  "hsl": {
    "h": 200.917,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.56452,
    "c": 0.0918,
    "h": 235.1
  },
  "luminance": 0.18414
}

Semantic roles & 50–950 ramp

primary

#377EA4

secondary

#BE9179

accent

#7F4FD9

background

#F7FAFB

surface

#EEF3F7

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #377EA4

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

Preview Lab → · Contrast checker → · Palette generator →