#1B2AB3#1B2AB3

#1B2AB3 is a dark, highly saturated blue. Relative luminance 0.051; OKLCH L 39.1% C 0.210 H 267.8°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B2AB3
RGB	rgb(27, 42, 179)
HSL	hsl(234, 74%, 40%)
HSV	hsv(234, 85%, 70%)
CMYK	cmyk(84.9%, 76.5%, 0%, 29.8%)
CIE-LAB	lab(27.14, 45.40, -72.51)
CIE-LCH	lch(27.14, 85.56, 302.05°)
OKLab	oklab(39.09% -0.008 -0.2102)
OKLCH	oklch(39.09% 0.21 267.8)
XYZ	xyz(9.4138, 5.1425, 43.1355)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2AB3 #B3A41B

analogous

#1B76B3 #1B2AB3 #581BB3

triadic

#1B2AB3 #B31B2A #2AB31B

tetradic

#1B2AB3 #B31B76 #B3A41B #1BB358

square

#1B2AB3 #B31B76 #B3A41B #1BB358

split-complementary

#1B2AB3 #B3581B #76B31B

monochromatic

#0B1149 #131E7E #1B2AB3 #2C3EDF #616EE7

Accessibility & contrast

On white

10.35

#1B2AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1B2AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2AB3

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2AB3	#FFFFFF	#000000	##FFFFFF
##1B2AB3	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B7

Deuteranopia (green-blind)

#0038B1

Tritanopia (blue-blind)

#00536D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b2ab3;
/* rgb */ color: rgb(27, 42, 179);
/* oklch */ color: oklch(39.1% 0.210 267.8);

Tailwind

colors: {
  custom: {
    50: '#7765cb',
    500: '#1b2ab3',
    950: '#000000',
  },
}

SCSS

$custom: #1b2ab3;
$custom-light: #7765cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2ab3",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 179
  },
  "hsl": {
    "h": 234.079,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.39087,
    "c": 0.21033,
    "h": 267.8
  },
  "luminance": 0.05144
}

Semantic roles & 50–950 ramp

primary

#1B2AB3

secondary

#CCC15E

accent

#DE37F0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #1B2AB3

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

Preview Lab → · Contrast checker → · Palette generator →