#1B5D7B#1B5D7B

#1B5D7B is a mid, moderate cyan. Relative luminance 0.095; OKLCH L 45.2% C 0.081 H 232.6°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B5D7B
RGB	rgb(27, 93, 123)
HSL	hsl(199, 64%, 29%)
HSV	hsv(199, 78%, 48%)
CMYK	cmyk(78%, 24.4%, 0%, 51.8%)
CIE-LAB	lab(36.91, -9.50, -22.74)
CIE-LCH	lch(36.91, 24.64, 247.33°)
OKLab	oklab(45.2% -0.049 -0.064)
OKLCH	oklch(45.2% 0.081 232.6)
XYZ	xyz(7.9401, 9.4908, 20.1485)
Luminance	0.0949 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5D7B #7B391B

analogous

#1B7B69 #1B5D7B #1B2D7B

triadic

#1B5D7B #7B1B5D #5D7B1B

tetradic

#1B5D7B #691B7B #7B391B #2D7B1B

square

#1B5D7B #691B7B #7B391B #2D7B1B

split-complementary

#1B5D7B #7B1B2D #7B691B

monochromatic

#061319 #103749 #1B5D7B #2683AD #3CA5D4

Accessibility & contrast

On white

7.25

#1B5D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#1B5D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5D7B

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5D7B	#FFFFFF	#000000	##FFFFFF
##1B5D7B	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E5C7C

Deuteranopia (green-blind)

#41537B

Tritanopia (blue-blind)

#006567

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b5d7b;
/* rgb */ color: rgb(27, 93, 123);
/* oklch */ color: oklch(45.2% 0.081 232.6);

Tailwind

colors: {
  custom: {
    50: '#678aa1',
    500: '#1b5d7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b5d7b;
$custom-light: #678aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5d7b",
  "rgb": {
    "r": 27,
    "g": 93,
    "b": 123
  },
  "hsl": {
    "h": 198.75,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.45195,
    "c": 0.08059,
    "h": 232.6
  },
  "luminance": 0.09492
}

Semantic roles & 50–950 ramp

primary

#1B5D7B

secondary

#AF6543

accent

#7541E7

background

#F6F8F9

surface

#EBF0F2

border

#C6CBCC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #1B5D7B

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

Preview Lab → · Contrast checker → · Palette generator →