#1B3D9A#1B3D9A

#1B3D9A is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.8% C 0.157 H 264.7°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D9A
RGB	rgb(27, 61, 154)
HSL	hsl(224, 70%, 35%)
HSV	hsv(224, 82%, 60%)
CMYK	cmyk(82.5%, 60.4%, 0%, 39.6%)
CIE-LAB	lab(29.17, 24.00, -54.10)
CIE-LCH	lch(29.17, 59.19, 293.92°)
OKLab	oklab(39.82% -0.0144 -0.1564)
OKLCH	oklch(39.82% 0.157 264.7)
XYZ	xyz(7.9514, 5.9026, 31.2858)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D9A #9A781B

analogous

#1B7C9A #1B3D9A #381B9A

triadic

#1B3D9A #9A1B3D #3D9A1B

tetradic

#1B3D9A #9A1B7C #9A781B #1B9A38

square

#1B3D9A #9A1B7C #9A781B #1B9A38

split-complementary

#1B3D9A #9A381B #7C9A1B

monochromatic

#091432 #122866 #1B3D9A #2452CE #4F76E0

Accessibility & contrast

On white

9.63

#1B3D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1B3D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D9A

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D9A	#FFFFFF	#000000	##FFFFFF
##1B3D9A	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9D

Deuteranopia (green-blind)

#003F98

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3d9a;
/* rgb */ color: rgb(27, 61, 154);
/* oklch */ color: oklch(39.8% 0.157 264.7);

Tailwind

colors: {
  custom: {
    50: '#6e72b9',
    500: '#1b3d9a',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d9a;
$custom-light: #6e72b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d9a",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 154
  },
  "hsl": {
    "h": 223.937,
    "s": 70.166,
    "l": 35.49
  },
  "oklch": {
    "l": 0.39823,
    "c": 0.15711,
    "h": 264.7
  },
  "luminance": 0.05904
}

Semantic roles & 50–950 ramp

primary

#1B3D9A

secondary

#C3A34E

accent

#BD3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1B3D9A

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

Preview Lab → · Contrast checker → · Palette generator →