#377DD9#377DD9

#377DD9 is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 59.2% C 0.157 H 256.5°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#377DD9
RGB	rgb(55, 125, 217)
HSL	hsl(214, 68%, 53%)
HSV	hsv(214, 75%, 85%)
CMYK	cmyk(74.7%, 42.4%, 0%, 14.9%)
CIE-LAB	lab(52.38, 9.56, -53.43)
CIE-LCH	lch(52.38, 54.28, 280.14°)
OKLab	oklab(59.21% -0.0367 -0.1529)
OKLCH	oklch(59.21% 0.157 256.5)
XYZ	xyz(21.4289, 20.4868, 68.4572)
Luminance	0.2049 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DD9 #D99337

analogous

#37CED9 #377DD9 #4237D9

triadic

#377DD9 #D9377D #7DD937

tetradic

#377DD9 #D937CE #D99337 #37D942

square

#377DD9 #D937CE #D99337 #37D942

split-complementary

#377DD9 #D94237 #CED937

monochromatic

#18447E #2260B1 #377DD9 #6A9EE3 #9EC0ED

Accessibility & contrast

On white

4.12

#377DD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#377DD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DD9

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DD9	#FFFFFF	#000000	##000000
##377DD9	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5085DD

Deuteranopia (green-blind)

#3276D7

Tritanopia (blue-blind)

#0093A0

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #377dd9;
/* rgb */ color: rgb(55, 125, 217);
/* oklch */ color: oklch(59.2% 0.157 256.5);

Tailwind

colors: {
  custom: {
    50: '#83a2e5',
    500: '#377dd9',
    950: '#000000',
  },
}

SCSS

$custom: #377dd9;
$custom-light: #83a2e5;
$custom-dark: #000000;

JSON

{
  "hex": "#377dd9",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 217
  },
  "hsl": {
    "h": 214.074,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.59206,
    "c": 0.15723,
    "h": 256.5
  },
  "luminance": 0.20489
}

Semantic roles & 50–950 ramp

primary

#377DD9

secondary

#D9BB93

accent

#A03DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0F16

muted

#7D7E84

Preview Lab

Preview with #377DD9

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

Preview Lab → · Contrast checker → · Palette generator →