#1F5AB4#1F5AB4

#1F5AB4 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.2% C 0.155 H 259.1°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#1F5AB4
RGB	rgb(31, 90, 180)
HSL	hsl(216, 71%, 41%)
HSV	hsv(216, 83%, 71%)
CMYK	cmyk(82.8%, 50%, 0%, 29.4%)
CIE-LAB	lab(39.41, 15.15, -53.02)
CIE-LCH	lch(39.41, 55.14, 285.95°)
OKLab	oklab(48.25% -0.0293 -0.1526)
OKLCH	oklch(48.25% 0.155 259.1)
XYZ	xyz(12.4564, 10.8974, 44.6181)
Luminance	0.1090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5AB4 #B4791F

analogous

#1FA5B4 #1F5AB4 #2F1FB4

triadic

#1F5AB4 #B41F5A #5AB41F

tetradic

#1F5AB4 #B41FA5 #B4791F #1FB42F

square

#1F5AB4 #B41FA5 #B4791F #1FB42F

split-complementary

#1F5AB4 #B42F1F #A5B41F

monochromatic

#0D264C #164080 #1F5AB4 #3477DC #689AE5

Accessibility & contrast

On white

6.60

#1F5AB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#1F5AB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5AB4

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5AB4	#FFFFFF	#000000	##FFFFFF
##1F5AB4	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2264B7

Deuteranopia (green-blind)

#0057B2

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1f5ab4;
/* rgb */ color: rgb(31, 90, 180);
/* oklch */ color: oklch(48.2% 0.155 259.1);

Tailwind

colors: {
  custom: {
    50: '#7488cb',
    500: '#1f5ab4',
    950: '#000000',
  },
}

SCSS

$custom: #1f5ab4;
$custom-light: #7488cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5ab4",
  "rgb": {
    "r": 31,
    "g": 90,
    "b": 180
  },
  "hsl": {
    "h": 216.242,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.48247,
    "c": 0.15545,
    "h": 259.1
  },
  "luminance": 0.10899
}

Semantic roles & 50–950 ramp

primary

#1F5AB4

secondary

#CBA264

accent

#A73AED

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F5AB4

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

Preview Lab → · Contrast checker → · Palette generator →