#1B3A67#1B3A67

#1B3A67 is a dark, moderate blue. Relative luminance 0.042; OKLCH L 35.0% C 0.087 H 257.9°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A67
RGB	rgb(27, 58, 103)
HSL	hsl(216, 58%, 25%)
HSV	hsv(216, 74%, 40%)
CMYK	cmyk(73.8%, 43.7%, 0%, 59.6%)
CIE-LAB	lab(24.44, 5.38, -29.79)
CIE-LCH	lch(24.44, 30.27, 280.23°)
OKLab	oklab(35.01% -0.0183 -0.085)
OKLCH	oklch(35.01% 0.087 257.9)
XYZ	xyz(4.4123, 4.2379, 13.4148)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A67 #67481B

analogous

#1B6067 #1B3A67 #221B67

triadic

#1B3A67 #671B3A #3A671B

tetradic

#1B3A67 #671B60 #67481B #1B6722

square

#1B3A67 #671B60 #67481B #1B6722

split-complementary

#1B3A67 #67221B #60671B

monochromatic

#060E18 #0E1F37 #1B3A67 #285597 #3471C8

Accessibility & contrast

On white

11.37

#1B3A67 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3A67 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A67

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A67	#FFFFFF	#000000	##FFFFFF
##1B3A67	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253E69

Deuteranopia (green-blind)

#193766

Tritanopia (blue-blind)

#00444B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3a67;
/* rgb */ color: rgb(27, 58, 103);
/* oklch */ color: oklch(35.0% 0.087 257.9);

Tailwind

colors: {
  custom: {
    50: '#626f93',
    500: '#1b3a67',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a67;
$custom-light: #626f93;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a67",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 103
  },
  "hsl": {
    "h": 215.526,
    "s": 58.462,
    "l": 25.49
  },
  "oklch": {
    "l": 0.35014,
    "c": 0.08695,
    "h": 257.9
  },
  "luminance": 0.04238
}

Semantic roles & 50–950 ramp

primary

#1B3A67

secondary

#9C7742

accent

#A246E2

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1B3A67

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

Preview Lab → · Contrast checker → · Palette generator →