#1B366E#1B366E

#1B366E is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.103 H 262.8°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B366E
RGB	rgb(27, 54, 110)
HSL	hsl(220, 61%, 27%)
HSV	hsv(220, 75%, 43%)
CMYK	cmyk(75.5%, 50.9%, 0%, 56.9%)
CIE-LAB	lab(23.66, 11.06, -35.55)
CIE-LCH	lch(23.66, 37.23, 287.28°)
OKLab	oklab(34.57% -0.0128 -0.102)
OKLCH	oklch(34.57% 0.103 262.8)
XYZ	xyz(4.5846, 3.9966, 15.2786)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366E #6E531B

analogous

#1B606E #1B366E #2A1B6E

triadic

#1B366E #6E1B36 #366E1B

tetradic

#1B366E #6E1B60 #6E531B #1B6E2A

square

#1B366E #6E1B60 #6E531B #1B6E2A

split-complementary

#1B366E #6E2A1B #606E1B

monochromatic

#060C19 #0F1E3D #1B366E #274E9F #3667CE

Accessibility & contrast

On white

11.67

#1B366E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B366E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366E

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366E	#FFFFFF	#000000	##FFFFFF
##1B366E	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#173C70

Deuteranopia (green-blind)

#01356D

Tritanopia (blue-blind)

#00434C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366e;
/* rgb */ color: rgb(27, 54, 110);
/* oklch */ color: oklch(34.6% 0.103 262.8);

Tailwind

colors: {
  custom: {
    50: '#646c98',
    500: '#1b366e',
    950: '#000000',
  },
}

SCSS

$custom: #1b366e;
$custom-light: #646c98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366e",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 110
  },
  "hsl": {
    "h": 220.482,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.34565,
    "c": 0.10282,
    "h": 262.8
  },
  "luminance": 0.03997
}

Semantic roles & 50–950 ramp

primary

#1B366E

secondary

#A38342

accent

#B044E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B366E

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

Preview Lab → · Contrast checker → · Palette generator →