#1B2CB3#1B2CB3

#1B2CB3 is a dark, highly saturated blue. Relative luminance 0.053; OKLCH L 39.4% C 0.208 H 267.7°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B2CB3
RGB	rgb(27, 44, 179)
HSL	hsl(233, 74%, 40%)
HSV	hsv(233, 85%, 70%)
CMYK	cmyk(84.9%, 75.4%, 0%, 29.8%)
CIE-LAB	lab(27.54, 44.26, -71.85)
CIE-LCH	lch(27.54, 84.39, 301.63°)
OKLab	oklab(39.37% -0.0085 -0.2083)
OKLCH	oklch(39.37% 0.208 267.7)
XYZ	xyz(9.4865, 5.2879, 43.1598)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2CB3 #B3A21B

analogous

#1B78B3 #1B2CB3 #561BB3

triadic

#1B2CB3 #B31B2C #2CB31B

tetradic

#1B2CB3 #B31B78 #B3A21B #1BB356

square

#1B2CB3 #B31B78 #B3A21B #1BB356

split-complementary

#1B2CB3 #B3561B #78B31B

monochromatic

#0B1249 #131F7E #1B2CB3 #2C40DF #6170E7

Accessibility & contrast

On white

10.21

#1B2CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B2CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2CB3

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2CB3	#FFFFFF	#000000	##FFFFFF
##1B2CB3	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B7

Deuteranopia (green-blind)

#0039B1

Tritanopia (blue-blind)

#00546E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b2cb3;
/* rgb */ color: rgb(27, 44, 179);
/* oklch */ color: oklch(39.4% 0.208 267.7);

Tailwind

colors: {
  custom: {
    50: '#7766cb',
    500: '#1b2cb3',
    950: '#000000',
  },
}

SCSS

$custom: #1b2cb3;
$custom-light: #7766cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2cb3",
  "rgb": {
    "r": 27,
    "g": 44,
    "b": 179
  },
  "hsl": {
    "h": 233.289,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.39373,
    "c": 0.20844,
    "h": 267.7
  },
  "luminance": 0.05289
}

Semantic roles & 50–950 ramp

primary

#1B2CB3

secondary

#CCBF5E

accent

#DC37F0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #1B2CB3

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

Preview Lab → · Contrast checker → · Palette generator →