#1F4CB4#1F4CB4

#1F4CB4 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.3% C 0.173 H 263.4°. Best body text is #FFFFFF at 7.63:1 contrast (WCAG AA passes).

Color values

HEX	#1F4CB4
RGB	rgb(31, 76, 180)
HSL	hsl(222, 71%, 41%)
HSV	hsv(222, 83%, 71%)
CMYK	cmyk(82.8%, 57.8%, 0%, 29.4%)
CIE-LAB	lab(35.51, 24.46, -59.35)
CIE-LCH	lch(35.51, 64.19, 292.40°)
OKLab	oklab(45.28% -0.0198 -0.1715)
OKLCH	oklch(45.28% 0.173 263.4)
XYZ	xyz(11.3848, 8.7541, 44.2608)
Luminance	0.0876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4CB4 #B4871F

analogous

#1F97B4 #1F4CB4 #3D1FB4

triadic

#1F4CB4 #B41F4C #4CB41F

tetradic

#1F4CB4 #B41F97 #B4871F #1FB43D

square

#1F4CB4 #B41F97 #B4871F #1FB43D

split-complementary

#1F4CB4 #B43D1F #97B41F

monochromatic

#0D204C #163680 #1F4CB4 #3467DC #688EE5

Accessibility & contrast

On white

7.63

#1F4CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#1F4CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4CB4

7.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4CB4	#FFFFFF	#000000	##FFFFFF
##1F4CB4	1.00	7.63	2.75	7.63
#FFFFFF	7.63	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4cb4;
/* rgb */ color: rgb(31, 76, 180);
/* oklch */ color: oklch(45.3% 0.173 263.4);

Tailwind

colors: {
  custom: {
    50: '#757dcb',
    500: '#1f4cb4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4cb4;
$custom-light: #757dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4cb4",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 180
  },
  "hsl": {
    "h": 221.879,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45283,
    "c": 0.17267,
    "h": 263.4
  },
  "luminance": 0.08755
}

Semantic roles & 50–950 ramp

primary

#1F4CB4

secondary

#CBAC64

accent

#B73AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4CB4

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

Preview Lab → · Contrast checker → · Palette generator →