#1B258E#1B258E

#1B258E is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.2% C 0.170 H 269.6°. Best body text is #FFFFFF at 12.34:1 contrast (WCAG AA passes).

Color values

HEX	#1B258E
RGB	rgb(27, 37, 142)
HSL	hsl(235, 68%, 33%)
HSV	hsv(235, 81%, 56%)
CMYK	cmyk(81%, 73.9%, 0%, 44.3%)
CIE-LAB	lab(21.98, 35.34, -58.52)
CIE-LCH	lch(21.98, 68.36, 301.13°)
OKLab	oklab(34.2% -0.0012 -0.1695)
OKLCH	oklch(34.2% 0.17 269.6)
XYZ	xyz(5.9944, 3.5085, 25.9472)
Luminance	0.0351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B258E #8E841B

analogous

#1B5E8E #1B258E #4B1B8E

triadic

#1B258E #8E1B25 #258E1B

tetradic

#1B258E #8E1B5E #8E841B #1B8E4B

square

#1B258E #8E1B5E #8E841B #1B8E4B

split-complementary

#1B258E #8E4B1B #5E8E1B

monochromatic

#070A27 #11185B #1B258E #2532C1 #4754DC

Accessibility & contrast

On white

12.34

#1B258E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B258E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B258E

12.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B258E	#FFFFFF	#000000	##FFFFFF
##1B258E	1.00	12.34	1.70	12.34
#FFFFFF	12.34	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A91

Deuteranopia (green-blind)

#002F8C

Tritanopia (blue-blind)

#004357

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b258e;
/* rgb */ color: rgb(27, 37, 142);
/* oklch */ color: oklch(34.2% 0.170 269.6);

Tailwind

colors: {
  custom: {
    50: '#6d60b0',
    500: '#1b258e',
    950: '#000000',
  },
}

SCSS

$custom: #1b258e;
$custom-light: #6d60b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b258e",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 142
  },
  "hsl": {
    "h": 234.783,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34199,
    "c": 0.16952,
    "h": 269.6
  },
  "luminance": 0.03509
}

Semantic roles & 50–950 ramp

primary

#1B258E

secondary

#BEB347

accent

#DC3DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1B258E

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

Preview Lab → · Contrast checker → · Palette generator →