#377FDA#377FDA

#377FDA is a mid, vivid cyan. Relative luminance 0.211; OKLCH L 59.7% C 0.156 H 255.8°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#377FDA
RGB	rgb(55, 127, 218)
HSL	hsl(213, 69%, 54%)
HSV	hsv(213, 75%, 85%)
CMYK	cmyk(74.8%, 41.7%, 0%, 14.5%)
CIE-LAB	lab(53.00, 8.70, -53.00)
CIE-LCH	lch(53.00, 53.71, 279.32°)
OKLab	oklab(59.71% -0.0382 -0.1516)
OKLCH	oklch(59.71% 0.156 255.8)
XYZ	xyz(21.8151, 21.0504, 69.2295)
Luminance	0.2105 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FDA #DA9237

analogous

#37D0DA #377FDA #4037DA

triadic

#377FDA #DA377F #7FDA37

tetradic

#377FDA #DA37D0 #DA9237 #37DA40

square

#377FDA #DA37D0 #DA9237 #37DA40

split-complementary

#377FDA #DA4037 #D0DA37

monochromatic

#18457F #2161B3 #377FDA #6BA0E4 #9EC1ED

Accessibility & contrast

On white

4.03

#377FDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#377FDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FDA

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FDA	#FFFFFF	#000000	##000000
##377FDA	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5387DE

Deuteranopia (green-blind)

#3678D8

Tritanopia (blue-blind)

#0094A2

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #377fda;
/* rgb */ color: rgb(55, 127, 218);
/* oklch */ color: oklch(59.7% 0.156 255.8);

Tailwind

colors: {
  custom: {
    50: '#83a3e6',
    500: '#377fda',
    950: '#000000',
  },
}

SCSS

$custom: #377fda;
$custom-light: #83a3e6;
$custom-dark: #000000;

JSON

{
  "hex": "#377fda",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 218
  },
  "hsl": {
    "h": 213.497,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.59707,
    "c": 0.15633,
    "h": 255.8
  },
  "luminance": 0.21053
}

Semantic roles & 50–950 ramp

primary

#377FDA

secondary

#D9BA93

accent

#9E3CEC

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #377FDA

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

Preview Lab → · Contrast checker → · Palette generator →