#1B738B#1B738B

#1B738B is a mid, moderate cyan. Relative luminance 0.144; OKLCH L 51.7% C 0.087 H 221.0°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B738B
RGB	rgb(27, 115, 139)
HSL	hsl(193, 67%, 33%)
HSV	hsv(193, 81%, 55%)
CMYK	cmyk(80.6%, 17.3%, 0%, 45.5%)
CIE-LAB	lab(44.74, -16.39, -20.30)
CIE-LCH	lch(44.74, 26.09, 231.09°)
OKLab	oklab(51.69% -0.0653 -0.0568)
OKLCH	oklch(51.69% 0.087 221)
XYZ	xyz(11.2410, 14.3572, 26.5999)
Luminance	0.1436 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B738B #8B331B

analogous

#1B8B6B #1B738B #1B3B8B

triadic

#1B738B #8B1B73 #738B1B

tetradic

#1B738B #6B1B8B #8B331B #3B8B1B

square

#1B738B #6B1B8B #8B331B #3B8B1B

split-complementary

#1B738B #8B1B3B #8B6B1B

monochromatic

#071E25 #114958 #1B738B #259DBE #45BBDB

Accessibility & contrast

On white

5.42

#1B738B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#1B738B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B738B

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B738B	#FFFFFF	#000000	##FFFFFF
##1B738B	1.00	5.42	3.87	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#65708C

Deuteranopia (green-blind)

#56658B

Tritanopia (blue-blind)

#007B7B

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #1b738b;
/* rgb */ color: rgb(27, 115, 139);
/* oklch */ color: oklch(51.7% 0.087 221.0);

Tailwind

colors: {
  custom: {
    50: '#6b9bad',
    500: '#1b738b',
    950: '#000000',
  },
}

SCSS

$custom: #1b738b;
$custom-light: #6b9bad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b738b",
  "rgb": {
    "r": 27,
    "g": 115,
    "b": 139
  },
  "hsl": {
    "h": 192.857,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.51694,
    "c": 0.0866,
    "h": 221
  },
  "luminance": 0.14359
}

Semantic roles & 50–950 ramp

primary

#1B738B

secondary

#BC5F45

accent

#623DEA

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#080E10

muted

#7B7E7F

Preview Lab

Preview with #1B738B

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

Preview Lab → · Contrast checker → · Palette generator →