#1B358E#1B358E

#1B358E is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.1% C 0.151 H 266.3°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B358E
RGB	rgb(27, 53, 142)
HSL	hsl(226, 68%, 33%)
HSV	hsv(226, 81%, 56%)
CMYK	cmyk(81%, 62.7%, 0%, 44.3%)
CIE-LAB	lab(25.96, 24.73, -51.98)
CIE-LCH	lch(25.96, 57.57, 295.44°)
OKLab	oklab(37.11% -0.0097 -0.1503)
OKLCH	oklch(37.11% 0.151 266.3)
XYZ	xyz(6.6059, 4.7314, 26.1510)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B358E #8E741B

analogous

#1B6E8E #1B358E #3B1B8E

triadic

#1B358E #8E1B35 #358E1B

tetradic

#1B358E #8E1B6E #8E741B #1B8E3B

square

#1B358E #8E1B6E #8E741B #1B8E3B

split-complementary

#1B358E #8E3B1B #6E8E1B

monochromatic

#070F27 #11225B #1B358E #2548C1 #4769DC

Accessibility & contrast

On white

10.79

#1B358E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B358E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B358E

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B358E	#FFFFFF	#000000	##FFFFFF
##1B358E	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004391

Deuteranopia (green-blind)

#00388C

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b358e;
/* rgb */ color: rgb(27, 53, 142);
/* oklch */ color: oklch(37.1% 0.151 266.3);

Tailwind

colors: {
  custom: {
    50: '#6c6bb0',
    500: '#1b358e',
    950: '#000000',
  },
}

SCSS

$custom: #1b358e;
$custom-light: #6c6bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b358e",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 142
  },
  "hsl": {
    "h": 226.435,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37107,
    "c": 0.15064,
    "h": 266.3
  },
  "luminance": 0.04732
}

Semantic roles & 50–950 ramp

primary

#1B358E

secondary

#BEA347

accent

#C43DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B358E

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

Preview Lab → · Contrast checker → · Palette generator →