#1B258F#1B258F

#1B258F is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.3% C 0.171 H 269.6°. Best body text is #FFFFFF at 12.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B258F
RGB	rgb(27, 37, 143)
HSL	hsl(235, 68%, 33%)
HSV	hsv(235, 81%, 56%)
CMYK	cmyk(81.1%, 74.1%, 0%, 43.9%)
CIE-LAB	lab(22.08, 35.70, -58.96)
CIE-LCH	lch(22.08, 68.93, 301.19°)
OKLab	oklab(34.31% -0.0013 -0.1708)
OKLCH	oklch(34.31% 0.171 269.6)
XYZ	xyz(6.0698, 3.5386, 26.3444)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B258F #8F851B

analogous

#1B5F8F #1B258F #4B1B8F

triadic

#1B258F #8F1B25 #258F1B

tetradic

#1B258F #8F1B5F #8F851B #1B8F4B

square

#1B258F #8F1B5F #8F851B #1B8F4B

split-complementary

#1B258F #8F4B1B #5F8F1B

monochromatic

#080A28 #11185C #1B258F #2532C2 #4855DC

Accessibility & contrast

On white

12.30

#1B258F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B258F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B258F

12.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B258F	#FFFFFF	#000000	##FFFFFF
##1B258F	1.00	12.30	1.71	12.30
#FFFFFF	12.30	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B92

Deuteranopia (green-blind)

#002F8D

Tritanopia (blue-blind)

#004357

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b258f;
/* rgb */ color: rgb(27, 37, 143);
/* oklch */ color: oklch(34.3% 0.171 269.6);

Tailwind

colors: {
  custom: {
    50: '#6e60b1',
    500: '#1b258f',
    950: '#000000',
  },
}

SCSS

$custom: #1b258f;
$custom-light: #6e60b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b258f",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 143
  },
  "hsl": {
    "h": 234.828,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.3431,
    "c": 0.17081,
    "h": 269.6
  },
  "luminance": 0.03539
}

Semantic roles & 50–950 ramp

primary

#1B258F

secondary

#BEB448

accent

#DC3DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1B258F

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

Preview Lab → · Contrast checker → · Palette generator →