#1D5BB3#1D5BB3

#1D5BB3 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.3% C 0.153 H 258.2°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#1D5BB3
RGB	rgb(29, 91, 179)
HSL	hsl(215, 72%, 41%)
HSV	hsv(215, 84%, 70%)
CMYK	cmyk(83.8%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(39.57, 13.92, -52.17)
CIE-LCH	lch(39.57, 53.99, 284.94°)
OKLab	oklab(48.34% -0.0313 -0.1501)
OKLCH	oklch(48.34% 0.153 258.2)
XYZ	xyz(12.3815, 10.9965, 44.1091)
Luminance	0.1100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D5BB3 #B3751D

analogous

#1DA6B3 #1D5BB3 #2A1DB3

triadic

#1D5BB3 #B31D5B #5BB31D

tetradic

#1D5BB3 #B31DA6 #B3751D #1DB32A

square

#1D5BB3 #B31DA6 #B3751D #1DB32A

split-complementary

#1D5BB3 #B32A1D #A6B31D

monochromatic

#0C254A #14407E #1D5BB3 #3078DD #649AE6

Accessibility & contrast

On white

6.56

#1D5BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#1D5BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D5BB3

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D5BB3	#FFFFFF	#000000	##FFFFFF
##1D5BB3	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2664B6

Deuteranopia (green-blind)

#0057B1

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1d5bb3;
/* rgb */ color: rgb(29, 91, 179);
/* oklch */ color: oklch(48.3% 0.153 258.2);

Tailwind

colors: {
  custom: {
    50: '#7488ca',
    500: '#1d5bb3',
    950: '#000000',
  },
}

SCSS

$custom: #1d5bb3;
$custom-light: #7488ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d5bb3",
  "rgb": {
    "r": 29,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 215.2,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.48339,
    "c": 0.15336,
    "h": 258.2
  },
  "luminance": 0.10998
}

Semantic roles & 50–950 ramp

primary

#1D5BB3

secondary

#CB9F61

accent

#A439EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1D5BB3

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

Preview Lab → · Contrast checker → · Palette generator →