#1B458C#1B458C

#1B458C is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.4% C 0.127 H 260.3°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B458C
RGB	rgb(27, 69, 140)
HSL	hsl(218, 68%, 33%)
HSV	hsv(218, 81%, 55%)
CMYK	cmyk(80.7%, 50.7%, 0%, 45.1%)
CIE-LAB	lab(30.36, 12.84, -43.60)
CIE-LCH	lch(30.36, 45.45, 286.41°)
OKLab	oklab(40.38% -0.0215 -0.1254)
OKLCH	oklch(40.38% 0.127 260.3)
XYZ	xyz(7.3120, 6.3818, 25.6523)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B458C #8C621B

analogous

#1B7E8C #1B458C #291B8C

triadic

#1B458C #8C1B45 #458C1B

tetradic

#1B458C #8C1B7E #8C621B #1B8C29

square

#1B458C #8C1B7E #8C621B #1B8C29

split-complementary

#1B458C #8C291B #7E8C1B

monochromatic

#071225 #112C59 #1B458C #255EBF #467EDB

Accessibility & contrast

On white

9.22

#1B458C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B458C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B458C

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B458C	#FFFFFF	#000000	##FFFFFF
##1B458C	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4D8F

Deuteranopia (green-blind)

#00438B

Tritanopia (blue-blind)

#005662

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b458c;
/* rgb */ color: rgb(27, 69, 140);
/* oklch */ color: oklch(40.4% 0.127 260.3);

Tailwind

colors: {
  custom: {
    50: '#6a78ae',
    500: '#1b458c',
    950: '#000000',
  },
}

SCSS

$custom: #1b458c;
$custom-light: #6a78ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b458c",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 140
  },
  "hsl": {
    "h": 217.699,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.4038,
    "c": 0.12724,
    "h": 260.3
  },
  "luminance": 0.06383
}

Semantic roles & 50–950 ramp

primary

#1B458C

secondary

#BD9146

accent

#AA3DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B458C

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

Preview Lab → · Contrast checker → · Palette generator →