#1B259E#1B259E

#1B259E is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.0% C 0.190 H 268.9°. Best body text is #FFFFFF at 11.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B259E
RGB	rgb(27, 37, 158)
HSL	hsl(235, 71%, 36%)
HSV	hsv(235, 83%, 62%)
CMYK	cmyk(82.9%, 76.6%, 0%, 38%)
CIE-LAB	lab(23.75, 41.03, -65.45)
CIE-LCH	lch(23.75, 77.25, 302.09°)
OKLab	oklab(35.99% -0.0035 -0.1896)
OKLCH	oklch(35.99% 0.19 268.9)
XYZ	xyz(7.2830, 4.0239, 32.7340)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B259E #9E941B

analogous

#1B679E #1B259E #531B9E

triadic

#1B259E #9E1B25 #259E1B

tetradic

#1B259E #9E1B67 #9E941B #1B9E53

square

#1B259E #9E1B67 #9E941B #1B9E53

split-complementary

#1B259E #9E531B #679E1B

monochromatic

#090D35 #12196A #1B259E #2431D2 #525DE1

Accessibility & contrast

On white

11.63

#1B259E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B259E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B259E

11.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B259E	#FFFFFF	#000000	##FFFFFF
##1B259E	1.00	11.63	1.81	11.63
#FFFFFF	11.63	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA1

Deuteranopia (green-blind)

#00329C

Tritanopia (blue-blind)

#004960

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b259e;
/* rgb */ color: rgb(27, 37, 158);
/* oklch */ color: oklch(36.0% 0.190 268.9);

Tailwind

colors: {
  custom: {
    50: '#7261bc',
    500: '#1b259e',
    950: '#000000',
  },
}

SCSS

$custom: #1b259e;
$custom-light: #7261bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b259e",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 158
  },
  "hsl": {
    "h": 235.42,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.3599,
    "c": 0.18966,
    "h": 268.9
  },
  "luminance": 0.04025
}

Semantic roles & 50–950 ramp

primary

#1B259E

secondary

#C4BB51

accent

#E03AEE

background

#F7F5FB

surface

#EEEAF7

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #1B259E

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

Preview Lab → · Contrast checker → · Palette generator →