#1D57B3#1D57B3

#1D57B3 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.5% C 0.158 H 259.7°. Best body text is #FFFFFF at 6.85:1 contrast (WCAG AA passes).

Color values

HEX	#1D57B3
RGB	rgb(29, 87, 179)
HSL	hsl(217, 72%, 41%)
HSV	hsv(217, 84%, 70%)
CMYK	cmyk(83.8%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(38.43, 16.56, -54.02)
CIE-LCH	lch(38.43, 56.50, 287.04°)
OKLab	oklab(47.46% -0.0284 -0.1557)
OKLCH	oklch(47.46% 0.158 259.7)
XYZ	xyz(12.0486, 10.3308, 43.9981)
Luminance	0.1033 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D57B3 #B3791D

analogous

#1DA2B3 #1D57B3 #2E1DB3

triadic

#1D57B3 #B31D57 #57B31D

tetradic

#1D57B3 #B31DA2 #B3791D #1DB32E

square

#1D57B3 #B31DA2 #B3791D #1DB32E

split-complementary

#1D57B3 #B32E1D #A2B31D

monochromatic

#0C244A #143D7E #1D57B3 #3073DD #6497E6

Accessibility & contrast

On white

6.85

#1D57B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#1D57B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D57B3

6.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D57B3	#FFFFFF	#000000	##FFFFFF
##1D57B3	1.00	6.85	3.07	6.85
#FFFFFF	6.85	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1962B6

Deuteranopia (green-blind)

#0054B1

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #1d57b3;
/* rgb */ color: rgb(29, 87, 179);
/* oklch */ color: oklch(47.5% 0.158 259.7);

Tailwind

colors: {
  custom: {
    50: '#7485ca',
    500: '#1d57b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d57b3;
$custom-light: #7485ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d57b3",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 216.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.47461,
    "c": 0.15823,
    "h": 259.7
  },
  "luminance": 0.10332
}

Semantic roles & 50–950 ramp

primary

#1D57B3

secondary

#CBA261

accent

#A939EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1D57B3

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

Preview Lab → · Contrast checker → · Palette generator →