#1B4D7B#1B4D7B

#1B4D7B is a dark, moderate cyan. Relative luminance 0.070; OKLCH L 41.1% C 0.094 H 249.7°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D7B
RGB	rgb(27, 77, 123)
HSL	hsl(209, 64%, 29%)
HSV	hsv(209, 78%, 48%)
CMYK	cmyk(78%, 37.4%, 0%, 51.8%)
CIE-LAB	lab(31.74, 0.57, -30.86)
CIE-LCH	lch(31.74, 30.87, 271.05°)
OKLab	oklab(41.1% -0.0325 -0.0878)
OKLCH	oklch(41.1% 0.094 249.7)
XYZ	xyz(6.6797, 6.9701, 19.7284)
Luminance	0.0697 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D7B #7B491B

analogous

#1B7B79 #1B4D7B #1B1D7B

triadic

#1B4D7B #7B1B4D #4D7B1B

tetradic

#1B4D7B #791B7B #7B491B #1D7B1B

square

#1B4D7B #791B7B #7B491B #1D7B1B

split-complementary

#1B4D7B #7B1B1D #7B791B

monochromatic

#061019 #102E49 #1B4D7B #266CAD #3C8BD4

Accessibility & contrast

On white

8.77

#1B4D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1B4D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D7B

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D7B	#FFFFFF	#000000	##FFFFFF
##1B4D7B	1.00	8.77	2.39	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#38507D

Deuteranopia (green-blind)

#2A477A

Tritanopia (blue-blind)

#00585E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b4d7b;
/* rgb */ color: rgb(27, 77, 123);
/* oklch */ color: oklch(41.1% 0.094 249.7);

Tailwind

colors: {
  custom: {
    50: '#667ea1',
    500: '#1b4d7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d7b;
$custom-light: #667ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d7b",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 123
  },
  "hsl": {
    "h": 208.75,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.411,
    "c": 0.09365,
    "h": 249.7
  },
  "luminance": 0.06971
}

Semantic roles & 50–950 ramp

primary

#1B4D7B

secondary

#AF7743

accent

#9041E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#07090F

muted

#7A7B7E

Preview Lab

Preview with #1B4D7B

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

Preview Lab → · Contrast checker → · Palette generator →