#1B509E#1B509E

#1B509E is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.3% C 0.139 H 258.6°. Best body text is #FFFFFF at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B509E
RGB	rgb(27, 80, 158)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(82.9%, 49.4%, 0%, 38%)
CIE-LAB	lab(34.88, 12.65, -47.26)
CIE-LCH	lch(34.88, 48.92, 284.99°)
OKLab	oklab(44.25% -0.0274 -0.1359)
OKLCH	oklch(44.25% 0.139 258.6)
XYZ	xyz(9.4899, 8.4378, 33.4696)
Luminance	0.0844 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B509E #9E691B

analogous

#1B929E #1B509E #271B9E

triadic

#1B509E #9E1B50 #509E1B

tetradic

#1B509E #9E1B92 #9E691B #1B9E27

square

#1B509E #9E1B92 #9E691B #1B9E27

split-complementary

#1B509E #9E271B #929E1B

monochromatic

#091B35 #12366A #1B509E #246AD2 #528CE1

Accessibility & contrast

On white

7.81

#1B509E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1B509E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B509E

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B509E	#FFFFFF	#000000	##FFFFFF
##1B509E	1.00	7.81	2.69	7.81
#FFFFFF	7.81	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2258A1

Deuteranopia (green-blind)

#004C9C

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b509e;
/* rgb */ color: rgb(27, 80, 158);
/* oklch */ color: oklch(44.3% 0.139 258.6);

Tailwind

colors: {
  custom: {
    50: '#6e80bb',
    500: '#1b509e',
    950: '#000000',
  },
}

SCSS

$custom: #1b509e;
$custom-light: #6e80bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b509e",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 158
  },
  "hsl": {
    "h": 215.725,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.44254,
    "c": 0.13867,
    "h": 258.6
  },
  "luminance": 0.08439
}

Semantic roles & 50–950 ramp

primary

#1B509E

secondary

#C49551

accent

#A53AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B509E

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

Preview Lab → · Contrast checker → · Palette generator →