#1D5AB3#1D5AB3

#1D5AB3 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.1% C 0.155 H 258.6°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#1D5AB3
RGB	rgb(29, 90, 179)
HSL	hsl(216, 72%, 41%)
HSV	hsv(216, 84%, 70%)
CMYK	cmyk(83.8%, 49.7%, 0%, 29.8%)
CIE-LAB	lab(39.29, 14.58, -52.63)
CIE-LCH	lch(39.29, 54.61, 285.48°)
OKLab	oklab(48.12% -0.0306 -0.1515)
OKLCH	oklch(48.12% 0.155 258.6)
XYZ	xyz(12.2966, 10.8267, 44.0808)
Luminance	0.1083 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D5AB3 #B3761D

analogous

#1DA5B3 #1D5AB3 #2B1DB3

triadic

#1D5AB3 #B31D5A #5AB31D

tetradic

#1D5AB3 #B31DA5 #B3761D #1DB32B

square

#1D5AB3 #B31DA5 #B3761D #1DB32B

split-complementary

#1D5AB3 #B32B1D #A5B31D

monochromatic

#0C254A #14407E #1D5AB3 #3076DD #6499E6

Accessibility & contrast

On white

6.63

#1D5AB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#1D5AB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D5AB3

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D5AB3	#FFFFFF	#000000	##FFFFFF
##1D5AB3	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2364B6

Deuteranopia (green-blind)

#0056B1

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1d5ab3;
/* rgb */ color: rgb(29, 90, 179);
/* oklch */ color: oklch(48.1% 0.155 258.6);

Tailwind

colors: {
  custom: {
    50: '#7488ca',
    500: '#1d5ab3',
    950: '#000000',
  },
}

SCSS

$custom: #1d5ab3;
$custom-light: #7488ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d5ab3",
  "rgb": {
    "r": 29,
    "g": 90,
    "b": 179
  },
  "hsl": {
    "h": 215.6,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.48118,
    "c": 0.15457,
    "h": 258.6
  },
  "luminance": 0.10828
}

Semantic roles & 50–950 ramp

primary

#1D5AB3

secondary

#CBA061

accent

#A539EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1D5AB3

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

Preview Lab → · Contrast checker → · Palette generator →