#1D53BC#1D53BC

#1D53BC is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.3% C 0.175 H 261.9°. Best body text is #FFFFFF at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#1D53BC
RGB	rgb(29, 83, 188)
HSL	hsl(220, 73%, 43%)
HSV	hsv(220, 85%, 74%)
CMYK	cmyk(84.6%, 55.9%, 0%, 26.3%)
CIE-LAB	lab(37.98, 22.77, -60.03)
CIE-LCH	lch(37.98, 64.21, 290.77°)
OKLab	oklab(47.33% -0.0248 -0.1734)
OKLCH	oklch(47.33% 0.175 261.9)
XYZ	xyz(12.6738, 10.0770, 48.8443)
Luminance	0.1008 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D53BC #BC861D

analogous

#1DA2BC #1D53BC #371DBC

triadic

#1D53BC #BC1D53 #53BC1D

tetradic

#1D53BC #BC1DA2 #BC861D #1DBC37

square

#1D53BC #BC1DA2 #BC861D #1DBC37

split-complementary

#1D53BC #BC371D #A2BC1D

monochromatic

#0D2452 #153C87 #1D53BC #3670E0 #6B96E8

Accessibility & contrast

On white

6.96

#1D53BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#1D53BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D53BC

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D53BC	#FFFFFF	#000000	##FFFFFF
##1D53BC	1.00	6.96	3.02	6.96
#FFFFFF	6.96	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C0

Deuteranopia (green-blind)

#0053BA

Tritanopia (blue-blind)

#006D7F

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1d53bc;
/* rgb */ color: rgb(29, 83, 188);
/* oklch */ color: oklch(47.3% 0.175 261.9);

Tailwind

colors: {
  custom: {
    50: '#7682d1',
    500: '#1d53bc',
    950: '#000000',
  },
}

SCSS

$custom: #1d53bc;
$custom-light: #7682d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d53bc",
  "rgb": {
    "r": 29,
    "g": 83,
    "b": 188
  },
  "hsl": {
    "h": 219.623,
    "s": 73.272,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4733,
    "c": 0.17519,
    "h": 261.9
  },
  "luminance": 0.10079
}

Semantic roles & 50–950 ramp

primary

#1D53BC

secondary

#CEAB67

accent

#B138F0

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0A14

muted

#7C7C82

Preview Lab

Preview with #1D53BC

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

Preview Lab → · Contrast checker → · Palette generator →