#1B458F#1B458F

#1B458F is a dark, vivid blue. Relative luminance 0.065; OKLCH L 40.6% C 0.132 H 260.8°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#1B458F
RGB	rgb(27, 69, 143)
HSL	hsl(218, 68%, 33%)
HSV	hsv(218, 81%, 56%)
CMYK	cmyk(81.1%, 51.7%, 0%, 43.9%)
CIE-LAB	lab(30.57, 14.06, -45.09)
CIE-LCH	lch(30.57, 47.24, 287.32°)
OKLab	oklab(40.61% -0.021 -0.1298)
OKLCH	oklch(40.61% 0.132 260.8)
XYZ	xyz(7.5362, 6.4715, 26.8332)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B458F #8F651B

analogous

#1B7F8F #1B458F #2B1B8F

triadic

#1B458F #8F1B45 #458F1B

tetradic

#1B458F #8F1B7F #8F651B #1B8F2B

square

#1B458F #8F1B7F #8F651B #1B8F2B

split-complementary

#1B458F #8F2B1B #7F8F1B

monochromatic

#081328 #112C5C #1B458F #255EC2 #487EDC

Accessibility & contrast

On white

9.15

#1B458F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1B458F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B458F

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B458F	#FFFFFF	#000000	##FFFFFF
##1B458F	1.00	9.15	2.29	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164E92

Deuteranopia (green-blind)

#00438E

Tritanopia (blue-blind)

#005763

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b458f;
/* rgb */ color: rgb(27, 69, 143);
/* oklch */ color: oklch(40.6% 0.132 260.8);

Tailwind

colors: {
  custom: {
    50: '#6b78b0',
    500: '#1b458f',
    950: '#000000',
  },
}

SCSS

$custom: #1b458f;
$custom-light: #6b78b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b458f",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 143
  },
  "hsl": {
    "h": 218.276,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.40614,
    "c": 0.1315,
    "h": 260.8
  },
  "luminance": 0.06472
}

Semantic roles & 50–950 ramp

primary

#1B458F

secondary

#BE9348

accent

#AC3DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B458F

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

Preview Lab → · Contrast checker → · Palette generator →