#377BDE#377BDE

#377BDE is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.1% C 0.166 H 258.1°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#377BDE
RGB	rgb(55, 123, 222)
HSL	hsl(216, 72%, 54%)
HSV	hsv(216, 75%, 87%)
CMYK	cmyk(75.2%, 44.6%, 0%, 12.9%)
CIE-LAB	lab(52.12, 12.63, -56.68)
CIE-LCH	lch(52.12, 58.07, 282.56°)
OKLab	oklab(59.1% -0.0341 -0.1624)
OKLCH	oklch(59.1% 0.166 258.1)
XYZ	xyz(21.8385, 20.2496, 71.8507)
Luminance	0.2025 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BDE #DE9A37

analogous

#37CFDE #377BDE #4737DE

triadic

#377BDE #DE377B #7BDE37

tetradic

#377BDE #DE37CF #DE9A37 #37DE47

square

#377BDE #DE37CF #DE9A37 #37DE47

split-complementary

#377BDE #DE4737 #CFDE37

monochromatic

#164385 #1F5EB9 #377BDE #6C9EE7 #A0C0EF

Accessibility & contrast

On white

4.16

#377BDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#377BDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BDE

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BDE	#FFFFFF	#000000	##000000
##377BDE	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4884E2

Deuteranopia (green-blind)

#2475DC

Tritanopia (blue-blind)

#0092A2

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #377bde;
/* rgb */ color: rgb(55, 123, 222);
/* oklch */ color: oklch(59.1% 0.166 258.1);

Tailwind

colors: {
  custom: {
    50: '#84a0e9',
    500: '#377bde',
    950: '#000000',
  },
}

SCSS

$custom: #377bde;
$custom-light: #84a0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#377bde",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 222
  },
  "hsl": {
    "h": 215.569,
    "s": 71.674,
    "l": 54.314
  },
  "oklch": {
    "l": 0.59096,
    "c": 0.16599,
    "h": 258.1
  },
  "luminance": 0.20252
}

Semantic roles & 50–950 ramp

primary

#377BDE

secondary

#DCBF95

accent

#A539EE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #377BDE

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

Preview Lab → · Contrast checker → · Palette generator →