#1B3F97#1B3F97

#1B3F97 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.0% C 0.150 H 263.9°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F97
RGB	rgb(27, 63, 151)
HSL	hsl(223, 70%, 35%)
HSV	hsv(223, 82%, 59%)
CMYK	cmyk(82.1%, 58.3%, 0%, 40.8%)
CIE-LAB	lab(29.47, 21.43, -51.78)
CIE-LCH	lch(29.47, 56.04, 292.48°)
OKLab	oklab(39.97% -0.0159 -0.1496)
OKLCH	oklch(39.97% 0.15 263.9)
XYZ	xyz(7.8134, 6.0215, 30.0226)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F97 #97731B

analogous

#1B7D97 #1B3F97 #351B97

triadic

#1B3F97 #971B3F #3F971B

tetradic

#1B3F97 #971B7D #97731B #1B9735

square

#1B3F97 #971B7D #97731B #1B9735

split-complementary

#1B3F97 #97351B #7D971B

monochromatic

#08142F #122963 #1B3F97 #2455CB #4D78DF

Accessibility & contrast

On white

9.53

#1B3F97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1B3F97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F97

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F97	#FFFFFF	#000000	##FFFFFF
##1B3F97	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9A

Deuteranopia (green-blind)

#004095

Tritanopia (blue-blind)

#005564

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3f97;
/* rgb */ color: rgb(27, 63, 151);
/* oklch */ color: oklch(40.0% 0.150 263.9);

Tailwind

colors: {
  custom: {
    50: '#6e73b6',
    500: '#1b3f97',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f97;
$custom-light: #6e73b6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f97",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 151
  },
  "hsl": {
    "h": 222.581,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39971,
    "c": 0.15043,
    "h": 263.9
  },
  "luminance": 0.06022
}

Semantic roles & 50–950 ramp

primary

#1B3F97

secondary

#C19F4C

accent

#B93BEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B3F97

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

Preview Lab → · Contrast checker → · Palette generator →