#1B78B3#1B78B3

#1B78B3 is a mid, vivid cyan. Relative luminance 0.169; OKLCH L 55.0% C 0.123 H 243.0°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B78B3
RGB	rgb(27, 120, 179)
HSL	hsl(203, 74%, 40%)
HSV	hsv(203, 85%, 70%)
CMYK	cmyk(84.9%, 33%, 0%, 29.8%)
CIE-LAB	lab(48.16, -4.54, -38.47)
CIE-LCH	lch(48.16, 38.73, 263.27°)
OKLab	oklab(55.03% -0.0558 -0.1094)
OKLCH	oklch(55.03% 0.123 243)
XYZ	xyz(15.3019, 16.9187, 45.0982)
Luminance	0.1692 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B78B3 #B3561B

analogous

#1BB3A2 #1B78B3 #1B2CB3

triadic

#1B78B3 #B31B78 #78B31B

tetradic

#1B78B3 #A21BB3 #B3561B #2CB31B

square

#1B78B3 #A21BB3 #B3561B #2CB31B

split-complementary

#1B78B3 #B31B2C #B3A21B

monochromatic

#0B3149 #13547E #1B78B3 #2C9ADF #61B3E7

Accessibility & contrast

On white

4.79

#1B78B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#1B78B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B78B3

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B78B3	#FFFFFF	#000000	##FFFFFF
##1B78B3	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7AB6

Deuteranopia (green-blind)

#476CB2

Tritanopia (blue-blind)

#00878D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #1b78b3;
/* rgb */ color: rgb(27, 120, 179);
/* oklch */ color: oklch(55.0% 0.123 243.0);

Tailwind

colors: {
  custom: {
    50: '#739eca',
    500: '#1b78b3',
    950: '#000000',
  },
}

SCSS

$custom: #1b78b3;
$custom-light: #739eca;
$custom-dark: #000000;

JSON

{
  "hex": "#1b78b3",
  "rgb": {
    "r": 27,
    "g": 120,
    "b": 179
  },
  "hsl": {
    "h": 203.289,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.55027,
    "c": 0.12277,
    "h": 243
  },
  "luminance": 0.16921
}

Semantic roles & 50–950 ramp

primary

#1B78B3

secondary

#CC895E

accent

#7F37F0

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #1B78B3

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

Preview Lab → · Contrast checker → · Palette generator →