#1B5783#1B5783

#1B5783 is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.1% C 0.094 H 244.9°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B5783
RGB	rgb(27, 87, 131)
HSL	hsl(205, 66%, 31%)
HSV	hsv(205, 79%, 51%)
CMYK	cmyk(79.4%, 33.6%, 0%, 48.6%)
CIE-LAB	lab(35.37, -2.73, -30.06)
CIE-LCH	lch(35.37, 30.18, 264.81°)
OKLab	oklab(44.11% -0.04 -0.0853)
OKLCH	oklch(44.11% 0.094 244.9)
XYZ	xyz(7.9553, 8.6872, 22.7258)
Luminance	0.0869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5783 #83471B

analogous

#1B837B #1B5783 #1B2383

triadic

#1B5783 #831B57 #57831B

tetradic

#1B5783 #7B1B83 #83471B #23831B

square

#1B5783 #7B1B83 #83471B #23831B

split-complementary

#1B5783 #831B23 #837B1B

monochromatic

#06141E #113550 #1B5783 #2579B6 #4198D8

Accessibility & contrast

On white

7.67

#1B5783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B5783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5783

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5783	#FFFFFF	#000000	##FFFFFF
##1B5783	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#435885

Deuteranopia (green-blind)

#344F82

Tritanopia (blue-blind)

#006267

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b5783;
/* rgb */ color: rgb(27, 87, 131);
/* oklch */ color: oklch(44.1% 0.094 244.9);

Tailwind

colors: {
  custom: {
    50: '#6886a7',
    500: '#1b5783',
    950: '#000000',
  },
}

SCSS

$custom: #1b5783;
$custom-light: #6886a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5783",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 131
  },
  "hsl": {
    "h": 205.385,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.44106,
    "c": 0.09425,
    "h": 244.9
  },
  "luminance": 0.08688
}

Semantic roles & 50–950 ramp

primary

#1B5783

secondary

#B67443

accent

#873FE9

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5783

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

Preview Lab → · Contrast checker → · Palette generator →