#377EB7#377EB7

#377EB7 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.4% C 0.113 H 245.9°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#377EB7
RGB	rgb(55, 126, 183)
HSL	hsl(207, 54%, 47%)
HSV	hsv(207, 70%, 72%)
CMYK	cmyk(69.9%, 31.1%, 0%, 28.2%)
CIE-LAB	lab(50.86, -3.32, -36.47)
CIE-LCH	lch(50.86, 36.62, 264.80°)
OKLab	oklab(57.43% -0.0462 -0.1032)
OKLCH	oklch(57.43% 0.113 245.9)
XYZ	xyz(17.5804, 19.1509, 47.5605)
Luminance	0.1915 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB7 #B77037

analogous

#37B7B0 #377EB7 #373EB7

triadic

#377EB7 #B7377E #7EB737

tetradic

#377EB7 #B037B7 #B77037 #3EB737

square

#377EB7 #B037B7 #B77037 #3EB737

split-complementary

#377EB7 #B7373E #B7B037

monochromatic

#1B3D59 #295E88 #377EB7 #5D9CCE #8CB9DC

Accessibility & contrast

On white

4.35

#377EB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#377EB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB7

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB7	#FFFFFF	#000000	##000000
##377EB7	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)

#6480B9

Deuteranopia (green-blind)

#5374B6

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377eb7;
/* rgb */ color: rgb(55, 126, 183);
/* oklch */ color: oklch(57.4% 0.113 245.9);

Tailwind

colors: {
  custom: {
    50: '#7da3cd',
    500: '#377eb7',
    950: '#000000',
  },
}

SCSS

$custom: #377eb7;
$custom-light: #7da3cd;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb7",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 183
  },
  "hsl": {
    "h": 206.719,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.57428,
    "c": 0.11307,
    "h": 245.9
  },
  "luminance": 0.19153
}

Semantic roles & 50–950 ramp

primary

#377EB7

secondary

#C7A183

accent

#8C4BDD

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB7

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

Preview Lab → · Contrast checker → · Palette generator →