#1B509F#1B509F

#1B509F is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.3% C 0.140 H 258.8°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B509F
RGB	rgb(27, 80, 159)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(83%, 49.7%, 0%, 37.6%)
CIE-LAB	lab(34.95, 13.06, -47.74)
CIE-LCH	lch(34.95, 49.50, 285.30°)
OKLab	oklab(44.33% -0.0272 -0.1374)
OKLCH	oklch(44.33% 0.14 258.8)
XYZ	xyz(9.5764, 8.4724, 33.9248)
Luminance	0.0847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B509F #9F6A1B

analogous

#1B929F #1B509F #281B9F

triadic

#1B509F #9F1B50 #509F1B

tetradic

#1B509F #9F1B92 #9F6A1B #1B9F28

square

#1B509F #9F1B92 #9F6A1B #1B9F28

split-complementary

#1B509F #9F281B #929F1B

monochromatic

#091B36 #12366B #1B509F #246AD3 #538CE2

Accessibility & contrast

On white

7.79

#1B509F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1B509F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B509F

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B509F	#FFFFFF	#000000	##FFFFFF
##1B509F	1.00	7.79	2.69	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2158A2

Deuteranopia (green-blind)

#004D9D

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b509f;
/* rgb */ color: rgb(27, 80, 159);
/* oklch */ color: oklch(44.3% 0.140 258.8);

Tailwind

colors: {
  custom: {
    50: '#6f80bc',
    500: '#1b509f',
    950: '#000000',
  },
}

SCSS

$custom: #1b509f;
$custom-light: #6f80bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b509f",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 159
  },
  "hsl": {
    "h": 215.909,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.4433,
    "c": 0.14005,
    "h": 258.8
  },
  "luminance": 0.08474
}

Semantic roles & 50–950 ramp

primary

#1B509F

secondary

#C59651

accent

#A63AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1B509F

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

Preview Lab → · Contrast checker → · Palette generator →