#1F738B#1F738B

#1F738B is a mid, moderate cyan. Relative luminance 0.144; OKLCH L 51.8% C 0.085 H 221.6°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F738B
RGB	rgb(31, 115, 139)
HSL	hsl(193, 64%, 33%)
HSV	hsv(193, 78%, 55%)
CMYK	cmyk(77.7%, 17.3%, 0%, 45.5%)
CIE-LAB	lab(44.82, -15.92, -20.17)
CIE-LCH	lch(44.82, 25.69, 231.72°)
OKLab	oklab(51.78% -0.0637 -0.0564)
OKLCH	oklch(51.78% 0.085 221.6)
XYZ	xyz(11.3541, 14.4155, 26.6052)
Luminance	0.1442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F738B #8B371F

analogous

#1F8B6D #1F738B #1F3D8B

triadic

#1F738B #8B1F73 #738B1F

tetradic

#1F738B #6D1F8B #8B371F #3D8B1F

square

#1F738B #6D1F8B #8B371F #3D8B1F

split-complementary

#1F738B #8B1F3D #8B6D1F

monochromatic

#092027 #144A59 #1F738B #2A9CBD #4DB9D7

Accessibility & contrast

On white

5.41

#1F738B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#1F738B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F738B

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F738B	#FFFFFF	#000000	##FFFFFF
##1F738B	1.00	5.41	3.88	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.41	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: #1f738b;
/* rgb */ color: rgb(31, 115, 139);
/* oklch */ color: oklch(51.8% 0.085 221.6);

Tailwind

colors: {
  custom: {
    50: '#6d9bad',
    500: '#1f738b',
    950: '#000000',
  },
}

SCSS

$custom: #1f738b;
$custom-light: #6d9bad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f738b",
  "rgb": {
    "r": 31,
    "g": 115,
    "b": 139
  },
  "hsl": {
    "h": 193.333,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.51783,
    "c": 0.08509,
    "h": 221.6
  },
  "luminance": 0.14417
}

Semantic roles & 50–950 ramp

primary

#1F738B

secondary

#BA644C

accent

#6641E7

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#080E10

muted

#7B7E7F

Preview Lab

Preview with #1F738B

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

Preview Lab → · Contrast checker → · Palette generator →