#1B3DA0#1B3DA0

#1B3DA0 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.165 H 265.0°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B3DA0
RGB	rgb(27, 61, 160)
HSL	hsl(225, 71%, 37%)
HSV	hsv(225, 83%, 63%)
CMYK	cmyk(83.1%, 61.9%, 0%, 37.3%)
CIE-LAB	lab(29.68, 26.37, -56.90)
CIE-LCH	lch(29.68, 62.72, 294.87°)
OKLab	oklab(40.37% -0.0143 -0.1646)
OKLCH	oklch(40.37% 0.165 265)
XYZ	xyz(8.4637, 6.1075, 33.9837)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3DA0 #A07E1B

analogous

#1B80A0 #1B3DA0 #3C1BA0

triadic

#1B3DA0 #A01B3D #3DA01B

tetradic

#1B3DA0 #A01B80 #A07E1B #1BA03C

square

#1B3DA0 #A01B80 #A07E1B #1BA03C

split-complementary

#1B3DA0 #A03C1B #80A01B

monochromatic

#091537 #12296C #1B3DA0 #2451D4 #5378E2

Accessibility & contrast

On white

9.45

#1B3DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1B3DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3DA0

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3DA0	#FFFFFF	#000000	##FFFFFF
##1B3DA0	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00409E

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3da0;
/* rgb */ color: rgb(27, 61, 160);
/* oklch */ color: oklch(40.4% 0.165 265.0);

Tailwind

colors: {
  custom: {
    50: '#7072bd',
    500: '#1b3da0',
    950: '#000000',
  },
}

SCSS

$custom: #1b3da0;
$custom-light: #7072bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3da0",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 160
  },
  "hsl": {
    "h": 224.662,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40369,
    "c": 0.16526,
    "h": 265
  },
  "luminance": 0.06109
}

Semantic roles & 50–950 ramp

primary

#1B3DA0

secondary

#C5A852

accent

#C03AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3DA0

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

Preview Lab → · Contrast checker → · Palette generator →