#377BB4#377BB4

#377BB4 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.6% C 0.112 H 246.8°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#377BB4
RGB	rgb(55, 123, 180)
HSL	hsl(207, 53%, 46%)
HSV	hsv(207, 69%, 71%)
CMYK	cmyk(69.4%, 31.7%, 0%, 29.4%)
CIE-LAB	lab(49.82, -2.60, -36.37)
CIE-LCH	lch(49.82, 36.46, 265.91°)
OKLab	oklab(56.56% -0.0441 -0.1029)
OKLCH	oklch(56.56% 0.112 246.8)
XYZ	xyz(16.8936, 18.2716, 45.8076)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BB4 #B47037

analogous

#37B4AE #377BB4 #373CB4

triadic

#377BB4 #B4377B #7BB437

tetradic

#377BB4 #AE37B4 #B47037 #3CB437

square

#377BB4 #AE37B4 #B47037 #3CB437

split-complementary

#377BB4 #B4373C #B4AE37

monochromatic

#1A3B56 #295B85 #377BB4 #5B99CD #8AB6DB

Accessibility & contrast

On white

4.51

#377BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#377BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BB4

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BB4	#FFFFFF	#000000	##000000
##377BB4	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617DB6

Deuteranopia (green-blind)

#5071B3

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #377bb4;
/* rgb */ color: rgb(55, 123, 180);
/* oklch */ color: oklch(56.6% 0.112 246.8);

Tailwind

colors: {
  custom: {
    50: '#7ca0ca',
    500: '#377bb4',
    950: '#000000',
  },
}

SCSS

$custom: #377bb4;
$custom-light: #7ca0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377bb4",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 180
  },
  "hsl": {
    "h": 207.36,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.56561,
    "c": 0.112,
    "h": 246.8
  },
  "luminance": 0.18273
}

Semantic roles & 50–950 ramp

primary

#377BB4

secondary

#C6A081

accent

#8E4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377BB4

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

Preview Lab → · Contrast checker → · Palette generator →