#1F4D91#1F4D91

#1F4D91 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.7% C 0.123 H 258.4°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F4D91
RGB	rgb(31, 77, 145)
HSL	hsl(216, 65%, 35%)
HSV	hsv(216, 79%, 57%)
CMYK	cmyk(78.6%, 46.9%, 0%, 43.1%)
CIE-LAB	lab(33.23, 9.89, -42.03)
CIE-LCH	lch(33.23, 43.18, 283.24°)
OKLab	oklab(42.74% -0.0247 -0.1206)
OKLCH	oklch(42.74% 0.123 258.4)
XYZ	xyz(8.3279, 7.6424, 27.8188)
Luminance	0.0764 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4D91 #91631F

analogous

#1F8691 #1F4D91 #2A1F91

triadic

#1F4D91 #911F4D #4D911F

tetradic

#1F4D91 #911F86 #91631F #1F912A

square

#1F4D91 #911F86 #91631F #1F912A

split-complementary

#1F4D91 #912A1F #86911F

monochromatic

#09172C #14325F #1F4D91 #2A68C3 #5188DA

Accessibility & contrast

On white

8.30

#1F4D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#1F4D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4D91

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4D91	#FFFFFF	#000000	##FFFFFF
##1F4D91	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#295494

Deuteranopia (green-blind)

#0E4990

Tritanopia (blue-blind)

#005D68

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f4d91;
/* rgb */ color: rgb(31, 77, 145);
/* oklch */ color: oklch(42.7% 0.123 258.4);

Tailwind

colors: {
  custom: {
    50: '#6c7eb2',
    500: '#1f4d91',
    950: '#000000',
  },
}

SCSS

$custom: #1f4d91;
$custom-light: #6c7eb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4d91",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 145
  },
  "hsl": {
    "h": 215.789,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42735,
    "c": 0.12309,
    "h": 258.4
  },
  "luminance": 0.07643
}

Semantic roles & 50–950 ramp

primary

#1F4D91

secondary

#BD904F

accent

#A440E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4D91

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

Preview Lab → · Contrast checker → · Palette generator →