#1F5AB3#1F5AB3

#1F5AB3 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.2% C 0.154 H 259.0°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F5AB3
RGB	rgb(31, 90, 179)
HSL	hsl(216, 70%, 41%)
HSV	hsv(216, 83%, 70%)
CMYK	cmyk(82.7%, 49.7%, 0%, 29.8%)
CIE-LAB	lab(39.34, 14.75, -52.55)
CIE-LCH	lch(39.34, 54.58, 285.68°)
OKLab	oklab(48.17% -0.0295 -0.1512)
OKLCH	oklch(48.17% 0.154 259)
XYZ	xyz(12.3549, 10.8568, 44.0835)
Luminance	0.1086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5AB3 #B3781F

analogous

#1FA4B3 #1F5AB3 #2E1FB3

triadic

#1F5AB3 #B31F5A #5AB31F

tetradic

#1F5AB3 #B31FA4 #B3781F #1FB32E

square

#1F5AB3 #B31FA4 #B3781F #1FB32E

split-complementary

#1F5AB3 #B32E1F #A4B31F

monochromatic

#0D264B #16407F #1F5AB3 #3377DC #689AE5

Accessibility & contrast

On white

6.62

#1F5AB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#1F5AB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5AB3

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5AB3	#FFFFFF	#000000	##FFFFFF
##1F5AB3	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2464B6

Deuteranopia (green-blind)

#0056B1

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1f5ab3;
/* rgb */ color: rgb(31, 90, 179);
/* oklch */ color: oklch(48.2% 0.154 259.0);

Tailwind

colors: {
  custom: {
    50: '#7488ca',
    500: '#1f5ab3',
    950: '#000000',
  },
}

SCSS

$custom: #1f5ab3;
$custom-light: #7488ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5ab3",
  "rgb": {
    "r": 31,
    "g": 90,
    "b": 179
  },
  "hsl": {
    "h": 216.081,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.48172,
    "c": 0.15409,
    "h": 259
  },
  "luminance": 0.10858
}

Semantic roles & 50–950 ramp

primary

#1F5AB3

secondary

#CAA164

accent

#A63BED

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F5AB3

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

Preview Lab → · Contrast checker → · Palette generator →