#1F4991#1F4991

#1F4991 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 41.8% C 0.128 H 260.4°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F4991
RGB	rgb(31, 73, 145)
HSL	hsl(218, 65%, 35%)
HSV	hsv(218, 79%, 57%)
CMYK	cmyk(78.6%, 49.7%, 0%, 43.1%)
CIE-LAB	lab(32.03, 12.60, -43.95)
CIE-LCH	lch(32.03, 45.73, 285.99°)
OKLab	oklab(41.82% -0.0213 -0.1263)
OKLCH	oklch(41.82% 0.128 260.4)
XYZ	xyz(8.0566, 7.0998, 27.7284)
Luminance	0.0710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4991 #91671F

analogous

#1F8291 #1F4991 #2E1F91

triadic

#1F4991 #911F49 #49911F

tetradic

#1F4991 #911F82 #91671F #1F912E

square

#1F4991 #911F82 #91671F #1F912E

split-complementary

#1F4991 #912E1F #82911F

monochromatic

#09162C #14305F #1F4991 #2A62C3 #5183DA

Accessibility & contrast

On white

8.68

#1F4991 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1F4991 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4991

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4991	#FFFFFF	#000000	##FFFFFF
##1F4991	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#205194

Deuteranopia (green-blind)

#004690

Tritanopia (blue-blind)

#005A66

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f4991;
/* rgb */ color: rgb(31, 73, 145);
/* oklch */ color: oklch(41.8% 0.128 260.4);

Tailwind

colors: {
  custom: {
    50: '#6d7bb2',
    500: '#1f4991',
    950: '#000000',
  },
}

SCSS

$custom: #1f4991;
$custom-light: #6d7bb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4991",
  "rgb": {
    "r": 31,
    "g": 73,
    "b": 145
  },
  "hsl": {
    "h": 217.895,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.41816,
    "c": 0.12809,
    "h": 260.4
  },
  "luminance": 0.07101
}

Semantic roles & 50–950 ramp

primary

#1F4991

secondary

#BD944F

accent

#AA40E8

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4991

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

Preview Lab → · Contrast checker → · Palette generator →