#1B5397#1B5397

#1B5397 is a dark, vivid cyan. Relative luminance 0.087; OKLCH L 44.4% C 0.125 H 255.6°. Best body text is #FFFFFF at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#1B5397
RGB	rgb(27, 83, 151)
HSL	hsl(213, 70%, 35%)
HSV	hsv(213, 82%, 59%)
CMYK	cmyk(82.1%, 45%, 0%, 40.8%)
CIE-LAB	lab(35.31, 7.83, -42.34)
CIE-LCH	lch(35.31, 43.06, 280.48°)
OKLab	oklab(44.44% -0.0311 -0.1214)
OKLCH	oklch(44.44% 0.125 255.6)
XYZ	xyz(9.1291, 8.6528, 30.4612)
Luminance	0.0865 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5397 #975F1B

analogous

#1B9197 #1B5397 #211B97

triadic

#1B5397 #971B53 #53971B

tetradic

#1B5397 #971B91 #975F1B #1B9721

square

#1B5397 #971B91 #975F1B #1B9721

split-complementary

#1B5397 #97211B #91971B

monochromatic

#081A2F #123663 #1B5397 #2470CB #4D8FDF

Accessibility & contrast

On white

7.69

#1B5397 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1B5397 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5397

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5397	#FFFFFF	#000000	##FFFFFF
##1B5397	1.00	7.69	2.73	7.69
#FFFFFF	7.69	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#30599A

Deuteranopia (green-blind)

#164E96

Tritanopia (blue-blind)

#00636D

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b5397;
/* rgb */ color: rgb(27, 83, 151);
/* oklch */ color: oklch(44.4% 0.125 255.6);

Tailwind

colors: {
  custom: {
    50: '#6d82b6',
    500: '#1b5397',
    950: '#000000',
  },
}

SCSS

$custom: #1b5397;
$custom-light: #6d82b6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5397",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 151
  },
  "hsl": {
    "h": 212.903,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.44435,
    "c": 0.12534,
    "h": 255.6
  },
  "luminance": 0.08654
}

Semantic roles & 50–950 ramp

primary

#1B5397

secondary

#C18D4C

accent

#9C3BEC

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1B5397

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

Preview Lab → · Contrast checker → · Palette generator →