#1B4F7B#1B4F7B

#1B4F7B is a dark, moderate cyan. Relative luminance 0.073; OKLCH L 41.6% C 0.092 H 247.9°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F7B
RGB	rgb(27, 79, 123)
HSL	hsl(208, 64%, 29%)
HSV	hsv(208, 78%, 48%)
CMYK	cmyk(78%, 35.8%, 0%, 51.8%)
CIE-LAB	lab(32.38, -0.74, -29.85)
CIE-LCH	lch(32.38, 29.86, 268.58°)
OKLab	oklab(41.6% -0.0345 -0.0848)
OKLCH	oklch(41.6% 0.092 247.9)
XYZ	xyz(6.8218, 7.2542, 19.7757)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F7B #7B471B

analogous

#1B7B77 #1B4F7B #1B1F7B

triadic

#1B4F7B #7B1B4F #4F7B1B

tetradic

#1B4F7B #771B7B #7B471B #1F7B1B

square

#1B4F7B #771B7B #7B471B #1F7B1B

split-complementary

#1B4F7B #7B1B1F #7B771B

monochromatic

#061019 #102F49 #1B4F7B #266FAD #3C8FD4

Accessibility & contrast

On white

8.57

#1B4F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1B4F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F7B

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F7B	#FFFFFF	#000000	##FFFFFF
##1B4F7B	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B517D

Deuteranopia (green-blind)

#2D487A

Tritanopia (blue-blind)

#005A5F

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4f7b;
/* rgb */ color: rgb(27, 79, 123);
/* oklch */ color: oklch(41.6% 0.092 247.9);

Tailwind

colors: {
  custom: {
    50: '#6680a1',
    500: '#1b4f7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f7b;
$custom-light: #6680a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f7b",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 123
  },
  "hsl": {
    "h": 207.5,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.41603,
    "c": 0.09159,
    "h": 247.9
  },
  "luminance": 0.07255
}

Semantic roles & 50–950 ramp

primary

#1B4F7B

secondary

#AF7443

accent

#8D41E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1B4F7B

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

Preview Lab → · Contrast checker → · Palette generator →