#1B4783#1B4783

#1B4783 is a dark, moderate cyan. Relative luminance 0.064; OKLCH L 40.2% C 0.112 H 257.2°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B4783
RGB	rgb(27, 71, 131)
HSL	hsl(215, 66%, 31%)
HSV	hsv(215, 79%, 51%)
CMYK	cmyk(79.4%, 45.8%, 0%, 48.6%)
CIE-LAB	lab(30.35, 7.81, -38.06)
CIE-LCH	lch(30.35, 38.85, 281.60°)
OKLab	oklab(40.17% -0.0248 -0.1091)
OKLCH	oklch(40.17% 0.112 257.2)
XYZ	xyz(6.8005, 6.3774, 22.3409)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4783 #83571B

analogous

#1B7B83 #1B4783 #231B83

triadic

#1B4783 #831B47 #47831B

tetradic

#1B4783 #831B7B #83571B #1B8323

square

#1B4783 #831B7B #83571B #1B8323

split-complementary

#1B4783 #83231B #7B831B

monochromatic

#06101E #112B50 #1B4783 #2563B6 #4181D8

Accessibility & contrast

On white

9.23

#1B4783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B4783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4783

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4783	#FFFFFF	#000000	##FFFFFF
##1B4783	1.00	9.23	2.28	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284D85

Deuteranopia (green-blind)

#134382

Tritanopia (blue-blind)

#00555E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b4783;
/* rgb */ color: rgb(27, 71, 131);
/* oklch */ color: oklch(40.2% 0.112 257.2);

Tailwind

colors: {
  custom: {
    50: '#6879a7',
    500: '#1b4783',
    950: '#000000',
  },
}

SCSS

$custom: #1b4783;
$custom-light: #6879a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4783",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 131
  },
  "hsl": {
    "h": 214.615,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.40174,
    "c": 0.11184,
    "h": 257.2
  },
  "luminance": 0.06378
}

Semantic roles & 50–950 ramp

primary

#1B4783

secondary

#B68643

accent

#A13FE9

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4783

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

Preview Lab → · Contrast checker → · Palette generator →