#1B3F90#1B3F90

#1B3F90 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.141 H 263.3°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F90
RGB	rgb(27, 63, 144)
HSL	hsl(222, 68%, 34%)
HSV	hsv(222, 81%, 56%)
CMYK	cmyk(81.3%, 56.3%, 0%, 43.5%)
CIE-LAB	lab(28.90, 18.61, -48.41)
CIE-LCH	lch(28.90, 51.86, 291.03°)
OKLab	oklab(39.37% -0.0164 -0.1397)
OKLCH	oklch(39.37% 0.141 263.3)
XYZ	xyz(7.2617, 5.8008, 27.1171)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F90 #906C1B

analogous

#1B7990 #1B3F90 #311B90

triadic

#1B3F90 #901B3F #3F901B

tetradic

#1B3F90 #901B79 #906C1B #1B9031

square

#1B3F90 #901B79 #906C1B #1B9031

split-complementary

#1B3F90 #90311B #79901B

monochromatic

#081229 #11285C #1B3F90 #2556C4 #4976DD

Accessibility & contrast

On white

9.72

#1B3F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1B3F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F90

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F90	#FFFFFF	#000000	##FFFFFF
##1B3F90	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A93

Deuteranopia (green-blind)

#003F8E

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b3f90;
/* rgb */ color: rgb(27, 63, 144);
/* oklch */ color: oklch(39.4% 0.141 263.3);

Tailwind

colors: {
  custom: {
    50: '#6c73b1',
    500: '#1b3f90',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f90;
$custom-light: #6c73b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f90",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 144
  },
  "hsl": {
    "h": 221.538,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.3937,
    "c": 0.14064,
    "h": 263.3
  },
  "luminance": 0.05802
}

Semantic roles & 50–950 ramp

primary

#1B3F90

secondary

#BF9A48

accent

#B63DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B3F90

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

Preview Lab → · Contrast checker → · Palette generator →