#1B4B98#1B4B98

#1B4B98 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.7% C 0.137 H 259.7°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B98
RGB	rgb(27, 75, 152)
HSL	hsl(217, 70%, 35%)
HSV	hsv(217, 82%, 60%)
CMYK	cmyk(82.2%, 50.7%, 0%, 40.4%)
CIE-LAB	lab(32.99, 13.61, -46.68)
CIE-LCH	lch(32.99, 48.63, 286.25°)
OKLab	oklab(42.67% -0.0245 -0.1344)
OKLCH	oklch(42.67% 0.137 259.7)
XYZ	xyz(8.6335, 7.5311, 30.6983)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B98 #98681B

analogous

#1B8998 #1B4B98 #2A1B98

triadic

#1B4B98 #981B4B #4B981B

tetradic

#1B4B98 #981B89 #98681B #1B982A

square

#1B4B98 #981B89 #98681B #1B982A

split-complementary

#1B4B98 #982A1B #89981B

monochromatic

#091830 #123164 #1B4B98 #2465CC #4E86E0

Accessibility & contrast

On white

8.38

#1B4B98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B4B98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B98

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B98	#FFFFFF	#000000	##FFFFFF
##1B4B98	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C549B

Deuteranopia (green-blind)

#004896

Tritanopia (blue-blind)

#005E6A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4b98;
/* rgb */ color: rgb(27, 75, 152);
/* oklch */ color: oklch(42.7% 0.137 259.7);

Tailwind

colors: {
  custom: {
    50: '#6d7cb7',
    500: '#1b4b98',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b98;
$custom-light: #6d7cb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b98",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 152
  },
  "hsl": {
    "h": 216.96,
    "s": 69.832,
    "l": 35.098
  },
  "oklch": {
    "l": 0.42668,
    "c": 0.13657,
    "h": 259.7
  },
  "luminance": 0.07532
}

Semantic roles & 50–950 ramp

primary

#1B4B98

secondary

#C2954D

accent

#A83BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4B98

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

Preview Lab → · Contrast checker → · Palette generator →