#377DDD#377DDD

#377DDD is a mid, vivid cyan. Relative luminance 0.207; OKLCH L 59.5% C 0.162 H 257.2°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#377DDD
RGB	rgb(55, 125, 221)
HSL	hsl(215, 71%, 54%)
HSV	hsv(215, 75%, 87%)
CMYK	cmyk(75.1%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(52.62, 11.03, -55.31)
CIE-LCH	lch(52.62, 56.40, 281.27°)
OKLab	oklab(59.46% -0.036 -0.1584)
OKLCH	oklch(59.46% 0.162 257.2)
XYZ	xyz(21.9555, 20.6974, 71.2305)
Luminance	0.2070 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DDD #DD9737

analogous

#37D0DD #377DDD #4437DD

triadic

#377DDD #DD377D #7DDD37

tetradic

#377DDD #DD37D0 #DD9737 #37DD44

square

#377DDD #DD37D0 #DD9737 #37DD44

split-complementary

#377DDD #DD4437 #D0DD37

monochromatic

#164483 #1F5FB8 #377DDD #6B9FE6 #A0C1EF

Accessibility & contrast

On white

4.09

#377DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#377DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DDD

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DDD	#FFFFFF	#000000	##000000
##377DDD	1.00	4.09	5.14	5.14
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D86E1

Deuteranopia (green-blind)

#2C77DB

Tritanopia (blue-blind)

#0094A2

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #377ddd;
/* rgb */ color: rgb(55, 125, 221);
/* oklch */ color: oklch(59.5% 0.162 257.2);

Tailwind

colors: {
  custom: {
    50: '#84a2e8',
    500: '#377ddd',
    950: '#000000',
  },
}

SCSS

$custom: #377ddd;
$custom-light: #84a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#377ddd",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 214.699,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.59462,
    "c": 0.16244,
    "h": 257.2
  },
  "luminance": 0.207
}

Semantic roles & 50–950 ramp

primary

#377DDD

secondary

#DBBD95

accent

#A23AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #377DDD

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

Preview Lab → · Contrast checker → · Palette generator →