#1B45A1#1B45A1

#1B45A1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.1% C 0.157 H 263.0°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B45A1
RGB	rgb(27, 69, 161)
HSL	hsl(221, 71%, 37%)
HSV	hsv(221, 83%, 63%)
CMYK	cmyk(83.2%, 57.1%, 0%, 36.9%)
CIE-LAB	lab(31.95, 21.32, -53.81)
CIE-LCH	lch(31.95, 57.88, 291.62°)
OKLab	oklab(42.09% -0.0192 -0.1554)
OKLCH	oklch(42.09% 0.157 263)
XYZ	xyz(9.0108, 7.0614, 34.5994)
Luminance	0.0706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B45A1 #A1771B

analogous

#1B88A1 #1B45A1 #341BA1

triadic

#1B45A1 #A11B45 #45A11B

tetradic

#1B45A1 #A11B88 #A1771B #1BA134

square

#1B45A1 #A11B88 #A1771B #1BA134

split-complementary

#1B45A1 #A1341B #88A11B

monochromatic

#091838 #122F6D #1B45A1 #245BD5 #5481E2

Accessibility & contrast

On white

8.71

#1B45A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1B45A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B45A1

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B45A1	#FFFFFF	#000000	##FFFFFF
##1B45A1	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A4

Deuteranopia (green-blind)

#00459F

Tritanopia (blue-blind)

#005C6C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b45a1;
/* rgb */ color: rgb(27, 69, 161);
/* oklch */ color: oklch(42.1% 0.157 263.0);

Tailwind

colors: {
  custom: {
    50: '#7078be',
    500: '#1b45a1',
    950: '#000000',
  },
}

SCSS

$custom: #1b45a1;
$custom-light: #7078be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b45a1",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 161
  },
  "hsl": {
    "h": 221.194,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.42092,
    "c": 0.15663,
    "h": 263
  },
  "luminance": 0.07062
}

Semantic roles & 50–950 ramp

primary

#1B45A1

secondary

#C5A152

accent

#B63AEE

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B45A1

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

Preview Lab → · Contrast checker → · Palette generator →