#1B2590#1B2590

#1B2590 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.172 H 269.5°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B2590
RGB	rgb(27, 37, 144)
HSL	hsl(235, 68%, 34%)
HSV	hsv(235, 81%, 56%)
CMYK	cmyk(81.3%, 74.3%, 0%, 43.5%)
CIE-LAB	lab(22.19, 36.06, -59.40)
CIE-LCH	lch(22.19, 69.50, 301.26°)
OKLab	oklab(34.42% -0.0015 -0.1721)
OKLCH	oklch(34.42% 0.172 269.5)
XYZ	xyz(6.1459, 3.5691, 26.7451)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2590 #90861B

analogous

#1B5F90 #1B2590 #4B1B90

triadic

#1B2590 #901B25 #25901B

tetradic

#1B2590 #901B5F #90861B #1B904B

square

#1B2590 #901B5F #90861B #1B904B

split-complementary

#1B2590 #904B1B #5F901B

monochromatic

#080B29 #11185C #1B2590 #2532C4 #4955DD

Accessibility & contrast

On white

12.25

#1B2590 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B2590 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2590

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2590	#FFFFFF	#000000	##FFFFFF
##1B2590	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B93

Deuteranopia (green-blind)

#002F8E

Tritanopia (blue-blind)

#004458

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2590;
/* rgb */ color: rgb(27, 37, 144);
/* oklch */ color: oklch(34.4% 0.172 269.5);

Tailwind

colors: {
  custom: {
    50: '#6e60b2',
    500: '#1b2590',
    950: '#000000',
  },
}

SCSS

$custom: #1b2590;
$custom-light: #6e60b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2590",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 144
  },
  "hsl": {
    "h": 234.872,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.3442,
    "c": 0.1721,
    "h": 269.5
  },
  "luminance": 0.0357
}

Semantic roles & 50–950 ramp

primary

#1B2590

secondary

#BFB448

accent

#DC3DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1B2590

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

Preview Lab → · Contrast checker → · Palette generator →