#1B306E#1B306E

#1B306E is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.2% C 0.111 H 266.3°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B306E
RGB	rgb(27, 48, 110)
HSL	hsl(225, 61%, 27%)
HSV	hsv(225, 75%, 43%)
CMYK	cmyk(75.5%, 56.4%, 0%, 56.9%)
CIE-LAB	lab(21.84, 15.35, -38.48)
CIE-LCH	lch(21.84, 41.43, 291.75°)
OKLab	oklab(33.18% -0.0072 -0.1108)
OKLCH	oklch(33.18% 0.111 266.3)
XYZ	xyz(4.3224, 3.4723, 15.1912)
Luminance	0.0347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B306E #6E591B

analogous

#1B5A6E #1B306E #301B6E

triadic

#1B306E #6E1B30 #306E1B

tetradic

#1B306E #6E1B5A #6E591B #1B6E30

square

#1B306E #6E1B5A #6E591B #1B6E30

split-complementary

#1B306E #6E301B #5A6E1B

monochromatic

#060B19 #0F1B3D #1B306E #27459F #365CCE

Accessibility & contrast

On white

12.39

#1B306E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B306E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B306E

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B306E	#FFFFFF	#000000	##FFFFFF
##1B306E	1.00	12.39	1.69	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#033870

Deuteranopia (green-blind)

#00316D

Tritanopia (blue-blind)

#003F4A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b306e;
/* rgb */ color: rgb(27, 48, 110);
/* oklch */ color: oklch(33.2% 0.111 266.3);

Tailwind

colors: {
  custom: {
    50: '#646798',
    500: '#1b306e',
    950: '#000000',
  },
}

SCSS

$custom: #1b306e;
$custom-light: #646798;
$custom-dark: #000000;

JSON

{
  "hex": "#1b306e",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 110
  },
  "hsl": {
    "h": 224.819,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.33183,
    "c": 0.11099,
    "h": 266.3
  },
  "luminance": 0.03473
}

Semantic roles & 50–950 ramp

primary

#1B306E

secondary

#A38A42

accent

#BB44E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B306E

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

Preview Lab → · Contrast checker → · Palette generator →