#1F4B91#1F4B91

#1F4B91 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 42.3% C 0.126 H 259.5°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B91
RGB	rgb(31, 75, 145)
HSL	hsl(217, 65%, 35%)
HSV	hsv(217, 79%, 57%)
CMYK	cmyk(78.6%, 48.3%, 0%, 43.1%)
CIE-LAB	lab(32.63, 11.24, -43.00)
CIE-LCH	lch(32.63, 44.44, 284.65°)
OKLab	oklab(42.27% -0.023 -0.1234)
OKLCH	oklch(42.27% 0.126 259.5)
XYZ	xyz(8.1901, 7.3668, 27.7729)
Luminance	0.0737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B91 #91651F

analogous

#1F8491 #1F4B91 #2C1F91

triadic

#1F4B91 #911F4B #4B911F

tetradic

#1F4B91 #911F84 #91651F #1F912C

square

#1F4B91 #911F84 #91651F #1F912C

split-complementary

#1F4B91 #912C1F #84911F

monochromatic

#09172C #14315F #1F4B91 #2A65C3 #5186DA

Accessibility & contrast

On white

8.49

#1F4B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1F4B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B91

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B91	#FFFFFF	#000000	##FFFFFF
##1F4B91	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#255294

Deuteranopia (green-blind)

#034890

Tritanopia (blue-blind)

#005C67

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4b91;
/* rgb */ color: rgb(31, 75, 145);
/* oklch */ color: oklch(42.3% 0.126 259.5);

Tailwind

colors: {
  custom: {
    50: '#6d7cb2',
    500: '#1f4b91',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b91;
$custom-light: #6d7cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b91",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 145
  },
  "hsl": {
    "h": 216.842,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42273,
    "c": 0.12557,
    "h": 259.5
  },
  "luminance": 0.07368
}

Semantic roles & 50–950 ramp

primary

#1F4B91

secondary

#BD924F

accent

#A740E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4B91

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

Preview Lab → · Contrast checker → · Palette generator →