#378DB3#378DB3

#378DB3 is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.8% C 0.099 H 230.7°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#378DB3
RGB	rgb(55, 141, 179)
HSL	hsl(198, 53%, 46%)
HSV	hsv(198, 69%, 70%)
CMYK	cmyk(69.3%, 21.2%, 0%, 29.8%)
CIE-LAB	lab(55.19, -13.31, -27.42)
CIE-LCH	lch(55.19, 30.48, 244.12°)
OKLab	oklab(60.8% -0.0629 -0.0769)
OKLCH	oklch(60.8% 0.099 230.7)
XYZ	xyz(19.2339, 23.1145, 46.0870)
Luminance	0.2312 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378DB3 #B35D37

analogous

#37B39B #378DB3 #374FB3

triadic

#378DB3 #B3378D #8DB337

tetradic

#378DB3 #9B37B3 #B35D37 #4FB337

square

#378DB3 #9B37B3 #B35D37 #4FB337

split-complementary

#378DB3 #B3374F #B39B37

monochromatic

#1A4355 #296884 #378DB3 #5BAACD #8AC2DB

Accessibility & contrast

On white

3.73

#378DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.62

#378DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378DB3

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378DB3	#FFFFFF	#000000	##000000
##378DB3	1.00	3.73	5.62	5.62
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.62	21.00	1.00	1.00
##000000	5.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8BB5

Deuteranopia (green-blind)

#697FB2

Tritanopia (blue-blind)

#00979A

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378db3;
/* rgb */ color: rgb(55, 141, 179);
/* oklch */ color: oklch(60.8% 0.099 230.7);

Tailwind

colors: {
  custom: {
    50: '#7daeca',
    500: '#378db3',
    950: '#000000',
  },
}

SCSS

$custom: #378db3;
$custom-light: #7daeca;
$custom-dark: #000000;

JSON

{
  "hex": "#378db3",
  "rgb": {
    "r": 55,
    "g": 141,
    "b": 179
  },
  "hsl": {
    "h": 198.387,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.60801,
    "c": 0.09934,
    "h": 230.7
  },
  "luminance": 0.23117
}

Semantic roles & 50–950 ramp

primary

#378DB3

secondary

#C59681

accent

#784BDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378DB3

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

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