#377BDD#377BDD

#377BDD is a mid, vivid blue. Relative luminance 0.202; OKLCH L 59.0% C 0.165 H 258.0°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#377BDD
RGB	rgb(55, 123, 221)
HSL	hsl(215, 71%, 54%)
HSV	hsv(215, 75%, 87%)
CMYK	cmyk(75.1%, 44.3%, 0%, 13.3%)
CIE-LAB	lab(52.06, 12.26, -56.21)
CIE-LCH	lch(52.06, 57.53, 282.31°)
OKLab	oklab(59.03% -0.0343 -0.1611)
OKLCH	oklch(59.03% 0.165 258)
XYZ	xyz(21.7049, 20.1961, 71.1469)
Luminance	0.2020 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BDD #DD9937

analogous

#37CEDD #377BDD #4637DD

triadic

#377BDD #DD377B #7BDD37

tetradic

#377BDD #DD37CE #DD9937 #37DD46

square

#377BDD #DD37CE #DD9937 #37DD46

split-complementary

#377BDD #DD4637 #CEDD37

monochromatic

#164383 #1F5EB8 #377BDD #6B9EE6 #A0C0EF

Accessibility & contrast

On white

4.17

#377BDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#377BDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BDD

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BDD	#FFFFFF	#000000	##000000
##377BDD	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4984E1

Deuteranopia (green-blind)

#2675DB

Tritanopia (blue-blind)

#0092A1

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377bdd;
/* rgb */ color: rgb(55, 123, 221);
/* oklch */ color: oklch(59.0% 0.165 258.0);

Tailwind

colors: {
  custom: {
    50: '#84a0e8',
    500: '#377bdd',
    950: '#000000',
  },
}

SCSS

$custom: #377bdd;
$custom-light: #84a0e8;
$custom-dark: #000000;

JSON

{
  "hex": "#377bdd",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 221
  },
  "hsl": {
    "h": 215.422,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.5903,
    "c": 0.16468,
    "h": 258
  },
  "luminance": 0.20199
}

Semantic roles & 50–950 ramp

primary

#377BDD

secondary

#DBBE95

accent

#A43AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #377BDD

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

Preview Lab → · Contrast checker → · Palette generator →