#1B458B#1B458B

#1B458B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.3% C 0.126 H 260.1°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B458B
RGB	rgb(27, 69, 139)
HSL	hsl(218, 67%, 33%)
HSV	hsv(218, 81%, 55%)
CMYK	cmyk(80.6%, 50.4%, 0%, 45.5%)
CIE-LAB	lab(30.28, 12.43, -43.10)
CIE-LCH	lch(30.28, 44.86, 286.09°)
OKLab	oklab(40.3% -0.0216 -0.1239)
OKLCH	oklch(40.3% 0.126 260.1)
XYZ	xyz(7.2386, 6.3525, 25.2657)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B458B #8B611B

analogous

#1B7D8B #1B458B #291B8B

triadic

#1B458B #8B1B45 #458B1B

tetradic

#1B458B #8B1B7D #8B611B #1B8B29

square

#1B458B #8B1B7D #8B611B #1B8B29

split-complementary

#1B458B #8B291B #7D8B1B

monochromatic

#071225 #112C58 #1B458B #255EBE #457EDB

Accessibility & contrast

On white

9.25

#1B458B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1B458B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B458B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B458B	#FFFFFF	#000000	##FFFFFF
##1B458B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4D8E

Deuteranopia (green-blind)

#00438A

Tritanopia (blue-blind)

#005661

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b458b;
/* rgb */ color: rgb(27, 69, 139);
/* oklch */ color: oklch(40.3% 0.126 260.1);

Tailwind

colors: {
  custom: {
    50: '#6a78ad',
    500: '#1b458b',
    950: '#000000',
  },
}

SCSS

$custom: #1b458b;
$custom-light: #6a78ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b458b",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 139
  },
  "hsl": {
    "h": 217.5,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.40303,
    "c": 0.1258,
    "h": 260.1
  },
  "luminance": 0.06353
}

Semantic roles & 50–950 ramp

primary

#1B458B

secondary

#BC9045

accent

#AA3DEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B458B

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

Preview Lab → · Contrast checker → · Palette generator →