#1B5398#1B5398

#1B5398 is a dark, vivid cyan. Relative luminance 0.087; OKLCH L 44.5% C 0.127 H 255.9°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B5398
RGB	rgb(27, 83, 152)
HSL	hsl(213, 70%, 35%)
HSV	hsv(213, 82%, 60%)
CMYK	cmyk(82.2%, 45.4%, 0%, 40.4%)
CIE-LAB	lab(35.37, 8.23, -42.85)
CIE-LCH	lch(35.37, 43.63, 280.88°)
OKLab	oklab(44.51% -0.0309 -0.1229)
OKLCH	oklch(44.51% 0.127 255.9)
XYZ	xyz(9.2106, 8.6854, 30.8907)
Luminance	0.0869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5398 #98601B

analogous

#1B9198 #1B5398 #221B98

triadic

#1B5398 #981B53 #53981B

tetradic

#1B5398 #981B91 #98601B #1B9822

square

#1B5398 #981B91 #98601B #1B9822

split-complementary

#1B5398 #98221B #91981B

monochromatic

#091A30 #123764 #1B5398 #246FCC #4E8FE0

Accessibility & contrast

On white

7.67

#1B5398 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B5398 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5398

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5398	#FFFFFF	#000000	##FFFFFF
##1B5398	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)

#2F599B

Deuteranopia (green-blind)

#144E97

Tritanopia (blue-blind)

#00636E

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b5398;
/* rgb */ color: rgb(27, 83, 152);
/* oklch */ color: oklch(44.5% 0.127 255.9);

Tailwind

colors: {
  custom: {
    50: '#6d82b7',
    500: '#1b5398',
    950: '#000000',
  },
}

SCSS

$custom: #1b5398;
$custom-light: #6d82b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5398",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 152
  },
  "hsl": {
    "h": 213.12,
    "s": 69.832,
    "l": 35.098
  },
  "oklch": {
    "l": 0.44506,
    "c": 0.12672,
    "h": 255.9
  },
  "luminance": 0.08687
}

Semantic roles & 50–950 ramp

primary

#1B5398

secondary

#C28D4D

accent

#9D3BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1B5398

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

Preview Lab → · Contrast checker → · Palette generator →