#1B3BA1#1B3BA1

#1B3BA1 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.1% C 0.169 H 265.5°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B3BA1
RGB	rgb(27, 59, 161)
HSL	hsl(226, 71%, 37%)
HSV	hsv(226, 83%, 63%)
CMYK	cmyk(83.2%, 63.4%, 0%, 36.9%)
CIE-LAB	lab(29.24, 28.11, -58.23)
CIE-LCH	lch(29.24, 64.66, 295.77°)
OKLab	oklab(40.07% -0.0132 -0.1685)
OKLCH	oklch(40.07% 0.169 265.5)
XYZ	xyz(8.4467, 5.9331, 34.4113)
Luminance	0.0593 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3BA1 #A1811B

analogous

#1B7EA1 #1B3BA1 #3E1BA1

triadic

#1B3BA1 #A11B3B #3BA11B

tetradic

#1B3BA1 #A11B7E #A1811B #1BA13E

square

#1B3BA1 #A11B7E #A1811B #1BA13E

split-complementary

#1B3BA1 #A13E1B #7EA11B

monochromatic

#091538 #12286D #1B3BA1 #244ED5 #5476E2

Accessibility & contrast

On white

9.60

#1B3BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1B3BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3BA1

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3BA1	#FFFFFF	#000000	##FFFFFF
##1B3BA1	1.00	9.60	2.19	9.60
#FFFFFF	9.60	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3ba1;
/* rgb */ color: rgb(27, 59, 161);
/* oklch */ color: oklch(40.1% 0.169 265.5);

Tailwind

colors: {
  custom: {
    50: '#7170be',
    500: '#1b3ba1',
    950: '#000000',
  },
}

SCSS

$custom: #1b3ba1;
$custom-light: #7170be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3ba1",
  "rgb": {
    "r": 27,
    "g": 59,
    "b": 161
  },
  "hsl": {
    "h": 225.672,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.4007,
    "c": 0.16906,
    "h": 265.5
  },
  "luminance": 0.05934
}

Semantic roles & 50–950 ramp

primary

#1B3BA1

secondary

#C5AA52

accent

#C33AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3BA1

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

Preview Lab → · Contrast checker → · Palette generator →