#1F4ABB#1F4ABB

#1F4ABB is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.5% C 0.184 H 264.3°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F4ABB
RGB	rgb(31, 74, 187)
HSL	hsl(223, 72%, 43%)
HSV	hsv(223, 83%, 73%)
CMYK	cmyk(83.4%, 60.4%, 0%, 26.7%)
CIE-LAB	lab(35.55, 28.51, -63.41)
CIE-LCH	lch(35.55, 69.52, 294.21°)
OKLab	oklab(45.49% -0.0184 -0.1835)
OKLCH	oklch(45.49% 0.184 264.3)
XYZ	xyz(11.9803, 8.7753, 48.0664)
Luminance	0.0878 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4ABB #BB901F

analogous

#1F98BB #1F4ABB #421FBB

triadic

#1F4ABB #BB1F4A #4ABB1F

tetradic

#1F4ABB #BB1F98 #BB901F #1FBB42

square

#1F4ABB #BB1F98 #BB901F #1FBB42

split-complementary

#1F4ABB #BB421F #98BB1F

monochromatic

#0E2052 #163587 #1F4ABB #3967DE #6E8FE7

Accessibility & contrast

On white

7.62

#1F4ABB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#1F4ABB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4ABB

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4ABB	#FFFFFF	#000000	##FFFFFF
##1F4ABB	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBF

Deuteranopia (green-blind)

#004DB9

Tritanopia (blue-blind)

#00677B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f4abb;
/* rgb */ color: rgb(31, 74, 187);
/* oklch */ color: oklch(45.5% 0.184 264.3);

Tailwind

colors: {
  custom: {
    50: '#777cd0',
    500: '#1f4abb',
    950: '#000000',
  },
}

SCSS

$custom: #1f4abb;
$custom-light: #777cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4abb",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 187
  },
  "hsl": {
    "h": 223.462,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.45493,
    "c": 0.18439,
    "h": 264.3
  },
  "luminance": 0.08777
}

Semantic roles & 50–950 ramp

primary

#1F4ABB

secondary

#CDB169

accent

#BC3AEE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0914

muted

#7C7B82

Preview Lab

Preview with #1F4ABB

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

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