#1B2F7B#1B2F7B

#1B2F7B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.1% C 0.132 H 267.5°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F7B
RGB	rgb(27, 47, 123)
HSL	hsl(228, 64%, 29%)
HSV	hsv(228, 78%, 48%)
CMYK	cmyk(78%, 61.8%, 0%, 51.8%)
CIE-LAB	lab(22.64, 21.33, -45.50)
CIE-LCH	lch(22.64, 50.25, 295.12°)
OKLab	oklab(34.12% -0.0057 -0.1314)
OKLCH	oklch(34.12% 0.132 267.5)
XYZ	xyz(5.0424, 3.6956, 19.1826)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F7B #7B671B

analogous

#1B5F7B #1B2F7B #371B7B

triadic

#1B2F7B #7B1B2F #2F7B1B

tetradic

#1B2F7B #7B1B5F #7B671B #1B7B37

square

#1B2F7B #7B1B5F #7B671B #1B7B37

split-complementary

#1B2F7B #7B371B #5F7B1B

monochromatic

#060A19 #101C49 #1B2F7B #2642AD #3C5CD4

Accessibility & contrast

On white

12.07

#1B2F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1B2F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F7B

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F7B	#FFFFFF	#000000	##FFFFFF
##1B2F7B	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00327A

Tritanopia (blue-blind)

#004250

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2f7b;
/* rgb */ color: rgb(27, 47, 123);
/* oklch */ color: oklch(34.1% 0.132 267.5);

Tailwind

colors: {
  custom: {
    50: '#6767a2',
    500: '#1b2f7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f7b;
$custom-light: #6767a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f7b",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 123
  },
  "hsl": {
    "h": 227.5,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.34119,
    "c": 0.13152,
    "h": 267.5
  },
  "luminance": 0.03696
}

Semantic roles & 50–950 ramp

primary

#1B2F7B

secondary

#AF9843

accent

#C441E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B2F7B

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

Preview Lab → · Contrast checker → · Palette generator →