#1B3F98#1B3F98

#1B3F98 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.1% C 0.152 H 264.0°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F98
RGB	rgb(27, 63, 152)
HSL	hsl(223, 70%, 35%)
HSV	hsv(223, 82%, 60%)
CMYK	cmyk(82.2%, 58.6%, 0%, 40.4%)
CIE-LAB	lab(29.55, 21.83, -52.26)
CIE-LCH	lch(29.55, 56.64, 292.67°)
OKLab	oklab(40.06% -0.0158 -0.151)
OKLCH	oklch(40.06% 0.152 264)
XYZ	xyz(7.8950, 6.0541, 30.4521)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F98 #98741B

analogous

#1B7D98 #1B3F98 #361B98

triadic

#1B3F98 #981B3F #3F981B

tetradic

#1B3F98 #981B7D #98741B #1B9836

square

#1B3F98 #981B7D #98741B #1B9836

split-complementary

#1B3F98 #98361B #7D981B

monochromatic

#091430 #122964 #1B3F98 #2455CC #4E78E0

Accessibility & contrast

On white

9.50

#1B3F98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B3F98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F98

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F98	#FFFFFF	#000000	##FFFFFF
##1B3F98	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9B

Deuteranopia (green-blind)

#004096

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3f98;
/* rgb */ color: rgb(27, 63, 152);
/* oklch */ color: oklch(40.1% 0.152 264.0);

Tailwind

colors: {
  custom: {
    50: '#6e73b7',
    500: '#1b3f98',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f98;
$custom-light: #6e73b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f98",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 152
  },
  "hsl": {
    "h": 222.72,
    "s": 69.832,
    "l": 35.098
  },
  "oklch": {
    "l": 0.40058,
    "c": 0.15182,
    "h": 264
  },
  "luminance": 0.06055
}

Semantic roles & 50–950 ramp

primary

#1B3F98

secondary

#C2A04D

accent

#BA3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B3F98

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

Preview Lab → · Contrast checker → · Palette generator →