#1B2597#1B2597

#1B2597 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.2% C 0.181 H 269.2°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B2597
RGB	rgb(27, 37, 151)
HSL	hsl(235, 70%, 35%)
HSV	hsv(235, 82%, 59%)
CMYK	cmyk(82.1%, 75.5%, 0%, 40.8%)
CIE-LAB	lab(22.96, 38.57, -62.46)
CIE-LCH	lch(22.96, 73.41, 301.70°)
OKLab	oklab(35.2% -0.0025 -0.1809)
OKLCH	oklch(35.2% 0.181 269.2)
XYZ	xyz(6.6976, 3.7897, 29.6507)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2597 #978D1B

analogous

#1B6397 #1B2597 #4F1B97

triadic

#1B2597 #971B25 #25971B

tetradic

#1B2597 #971B63 #978D1B #1B974F

square

#1B2597 #971B63 #978D1B #1B974F

split-complementary

#1B2597 #974F1B #63971B

monochromatic

#080C2F #121863 #1B2597 #2432CB #4D59DF

Accessibility & contrast

On white

11.94

#1B2597 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1B2597 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2597

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2597	#FFFFFF	#000000	##FFFFFF
##1B2597	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9A

Deuteranopia (green-blind)

#003195

Tritanopia (blue-blind)

#00465C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b2597;
/* rgb */ color: rgb(27, 37, 151);
/* oklch */ color: oklch(35.2% 0.181 269.2);

Tailwind

colors: {
  custom: {
    50: '#7061b7',
    500: '#1b2597',
    950: '#000000',
  },
}

SCSS

$custom: #1b2597;
$custom-light: #7061b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2597",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 151
  },
  "hsl": {
    "h": 235.161,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.35199,
    "c": 0.18097,
    "h": 269.2
  },
  "luminance": 0.03791
}

Semantic roles & 50–950 ramp

primary

#1B2597

secondary

#C1B84C

accent

#DE3BEC

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1B2597

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

Preview Lab → · Contrast checker → · Palette generator →