#377EB4#377EB4

#377EB4 is a mid, moderate cyan. Relative luminance 0.190; OKLCH L 57.3% C 0.109 H 244.5°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#377EB4
RGB	rgb(55, 126, 180)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 69%, 71%)
CMYK	cmyk(69.4%, 30%, 0%, 29.4%)
CIE-LAB	lab(50.72, -4.38, -34.97)
CIE-LCH	lch(50.72, 35.24, 262.86°)
OKLab	oklab(57.27% -0.0471 -0.0988)
OKLCH	oklch(57.27% 0.109 244.5)
XYZ	xyz(17.2715, 19.0274, 45.9336)
Luminance	0.1903 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB4 #B46D37

analogous

#37B4AB #377EB4 #373FB4

triadic

#377EB4 #B4377E #7EB437

tetradic

#377EB4 #AB37B4 #B46D37 #3FB437

square

#377EB4 #AB37B4 #B46D37 #3FB437

split-complementary

#377EB4 #B4373F #B4AB37

monochromatic

#1A3C56 #295D85 #377EB4 #5B9CCD #8AB8DB

Accessibility & contrast

On white

4.37

#377EB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#377EB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB4

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB4	#FFFFFF	#000000	##000000
##377EB4	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB6

Deuteranopia (green-blind)

#5473B3

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377eb4;
/* rgb */ color: rgb(55, 126, 180);
/* oklch */ color: oklch(57.3% 0.109 244.5);

Tailwind

colors: {
  custom: {
    50: '#7ca3ca',
    500: '#377eb4',
    950: '#000000',
  },
}

SCSS

$custom: #377eb4;
$custom-light: #7ca3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb4",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 180
  },
  "hsl": {
    "h": 205.92,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.57267,
    "c": 0.10949,
    "h": 244.5
  },
  "luminance": 0.19029
}

Semantic roles & 50–950 ramp

primary

#377EB4

secondary

#C69F81

accent

#8A4BDD

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB4

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

Preview Lab → · Contrast checker → · Palette generator →