#377FBB#377FBB

#377FBB is a mid, moderate cyan. Relative luminance 0.196; OKLCH L 57.9% C 0.117 H 246.8°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#377FBB
RGB	rgb(55, 127, 187)
HSL	hsl(207, 55%, 47%)
HSV	hsv(207, 71%, 73%)
CMYK	cmyk(70.6%, 32.1%, 0%, 26.7%)
CIE-LAB	lab(51.36, -2.50, -37.99)
CIE-LCH	lch(51.36, 38.07, 266.24°)
OKLab	oklab(57.88% -0.046 -0.1076)
OKLCH	oklch(57.88% 0.117 246.8)
XYZ	xyz(18.1312, 19.5768, 49.8272)
Luminance	0.1958 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FBB #BB7337

analogous

#37BBB5 #377FBB #373DBB

triadic

#377FBB #BB377F #7FBB37

tetradic

#377FBB #B537BB #BB7337 #3DBB37

square

#377FBB #B537BB #BB7337 #3DBB37

split-complementary

#377FBB #BB373D #BBB537

monochromatic

#1B3F5C #295F8C #377FBB #5F9DD0 #8EBADE

Accessibility & contrast

On white

4.27

#377FBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#377FBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FBB

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FBB	#FFFFFF	#000000	##000000
##377FBB	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6481BE

Deuteranopia (green-blind)

#5275BA

Tritanopia (blue-blind)

#008D94

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #377fbb;
/* rgb */ color: rgb(55, 127, 187);
/* oklch */ color: oklch(57.9% 0.117 246.8);

Tailwind

colors: {
  custom: {
    50: '#7da3cf',
    500: '#377fbb',
    950: '#000000',
  },
}

SCSS

$custom: #377fbb;
$custom-light: #7da3cf;
$custom-dark: #000000;

JSON

{
  "hex": "#377fbb",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 187
  },
  "hsl": {
    "h": 207.273,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.5788,
    "c": 0.11705,
    "h": 246.8
  },
  "luminance": 0.19579
}

Semantic roles & 50–950 ramp

primary

#377FBB

secondary

#C9A485

accent

#8D4ADE

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #377FBB

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

Preview Lab → · Contrast checker → · Palette generator →